Green’s Dictionary of Slang

trouser n.

also trowser
[? he will turn his hand to anything so long as he trousers his payment]

a jack of all trades, an odd-job man.

[UK]Daily Tel. 4 Nov. in Ware (1909) 250/2: Sir Reginald Hanson: What is a ‘trowser.’ Sweeting : Vy, a man as does any hod jobs. Anythin’.

SE in slang uses

In compounds

trouser chuff (n.) (also trouser cough) [chuff n.3 ; note synon. 17C cough in the breech, i.e. buttocks]

a fart.

[UK]Roger’s Profanisaurus in Viz 87 Dec. n.p.: trouser cough n. Fart; botty burp.
Roger’s Profanisaurus The Magna Farta 431/1: trouser chuff n. A Cornish seagull that lives in some trousers.
trouser department (n.)

the male genital area.

[UK]Roger’s Profanisaurus in Viz 98 Oct. 28: trouser department 1. n. Section of a department store dealing with men’s legwear. 2. euph. Area of the body where middle age men experience problems.
[Aus]L. Redhead Peepshow [ebook] Damn drugs shrivelled things in the trouser department.
[UK]B. Hare Urban Grimshaw 44: He’s not much use in the trouser department.
trouser pipe (n.)

a tight trouser-leg.

[SA]M. Melamu ‘Bad Times, Sad Times’ in Mutloatse Forced Landing 41: I’ve no choice but to irrigate the outside of the loo, while the landlord’s mongrel, Spotty, playfully tugs at my trouser-pipe. Ag, man, voetsek!
trouser rabbits (n.)

body lice.

[US]L.N. Smith Lingo of No Man’s Lnd 20: CHATTING Name applied to the indiscriminate hunt for petit friends called ‘cooties,’ ‘trouser-rabbits,’ etc.
trouser snake (n.)

the penis.

screenit.com 24 Aug. 🌐 Due to the rapid-fire delivery of dialogue, the following should be considered a minimum [...] 19 slang terms using male genitals ‘d*ck,’ ‘c*ck’ and ‘trouser snake.’.
thelondonpaper 4 Jan. 5: Well, it seems it takes more than a ‘trousersnake’ to keep sexy Cameron Diaz happy.
[US]Philadelphia Dly News (PA) 1 Feb. 40/1: Justin Timberlake (or as the Brits call him, Justin Trouser Snake).
[US]J. Hannaham Didn’t Nobody Give a Shit 259: ‘Can we just use the surveillance video to prove how shitfaced this guy is so I don’t have to see [his] trouser snake?’.
trouser trout (n.) (also trouser mouse)

(US) the penis.

[US]‘Jennifer Blowdryer’ Modern English 76: masturbation (v): Fishing for trouser trout.
[US] P. Munro Sl. U.
[US]Eble Campus Sl. Apr. 10: trouser mouse – penis.
[US]J. Ellroy ‘Hot-Prowl Rape-O’ in Destination: Morgue! (2004) 312: He panted. He salivated. [...] His trouser trout jumped in his jeans.

In phrases

not in these trousers

a light-hearted but definite phr. of dismissal, rejection.

Japan Chron. (Wkly Edn) 741-763 927: [A]s nearly as we could make out, her modest refusal meant:—‘Not in these trousers’.
[UK]‘Bartimeus’ Long Trick 25: They go out and try to coax Fritz to come out to play [...] Fritz says ‘Not in these trousers, I don’t think’.
F.L. Jennings In London’s Shadows 240: I think not, not in these trousers ! I think we should be foolish to suffer meekly the greed, the selfishness and the soullessness of those who grind us down.
[Aus]Aus. Forestry Jrnl 52/1: Prohibition — Not in these trousers (I mean kilts).
[UK]P. Gibbs Hidden City 129: ‘Not in these trousers!’ he answered in the old army slang.
[UK]Work to Do 52: ‘After havin’ your bit of a joke, would the duck-egg you laid on the roof o’ me skull be worth a tanner to you?’ ‘Not in these trousers’.
[UK]British Poultry [...] Digest 6-7 129/1: ‘Not for me Mister, not in these trousers’.
[UK]G. Kersh Hospitality of Miss Tolliver 184: She replied with a vulgarism which, freely translated, means, Not in these trousers!
wear the trousers (v.) (also wears the breeches) [‘wear the breeches’, used in 18C/19C theatre to indicate a woman playing a male role]

to dominate, usu. implying that the woman in a relationship is the one who dictates the rules.

[UK]Manchester Mercury 24 Oct. 4/3: Your Petitioners apprehend, that as the Men of H—n have not Spirit enough to learn fight the French, they may be usefully employ’d at Home in rocking the Cradle those Days, when the Women abroad are handling the Firelock, and humbly hope his G—e will obtain an Act in Favour of your Petitioners, that from the Day they are enrolled [in the militia] the Women in H—n may wear the Breeches.
[UK]Manchester Mercury 14 June 1/2: A Man and his Wife [...] in these Parts. lived very unhappily together [...] striving who should be Master; at laft the Husband, quite tired, swore, that if his Wife would be contented she shou’d wear the Breeches [...] this was literally complied with, the Husband constantlv appeals in Petticoats, and the Wife in Men’s Cloaths.
[UK]Ipswich Jrnl 21 Mar. 2/4: Whether from passion, love of pow’r or riches, / Women, we see, all love to wear the breeches.
[Ire]Dublin Eve. Post 30 Dec. 3/4: ‘Oh! my Wife, she wears the Breeches,’ a new jolly song by B— T—l, Esq.
[UK]Hants Chron. 16 May 4/1: ‘What are you married?’ said Swift. ‘Yes, Sir’ [...] ‘And who wears the breeches?’ said the dean. ‘My a— ’answered the other.
[UK]Bristol Mercury 20 Sept. 4/1: When even the women were so mettled, / ’Twould seem they really wore the breeches.
[UK]Satirist (London) 22 July 234/3: A fellow was last week brought to Mary-le-bone Police Office for thrashing his wife; he pleaded, in extenuation, that she wanted to wear the breeches.
[US]Nat. Police Gaz. (NY) 3 June 2/3: [T]hey [i.e. a married couple] must fight it out [...] the winner to be allowed the priviledge of donning the breeches.
Globe 7 Feb. 4/4: The [Louise] Michel code for women [...] The husband goes errands and beats the carpets; the wife wears the trousers and beats her husband.
[US]Eve. World (NY) 19 Dec. 4/6: It will not matter if it is sometimes just a little apparent [...] that she wears the trousers.
[Aus]Crowe Aus. Sl. Dict. 93: Breeches, ‘she wears the breeches,’ said of a wife who usurps her husband’s prerogative.
[US]Bennington Trib. (OK) 8 Mar. 4/6: Madame — yes — a good lady — keeps all things in order. Very energetic. [...] But what would you? She wears the trousers.
[US]Boston Sun. Globe (MA) 11 Dec. 7/6: It would be understating the case to say that she wears the trousers.
[Aus]Sport (Adelaide) 9 Oct. 5/5: She must be[...] / still willing to let him wear the breeches.
[US]Fort Worth Record-Telegram (TX) 4 June 6/3: King Ferdinand [...] is absolutely dominated by his wife. He may wear the sword, but she wears the trousers.
[SA]R. Campbell Georgiad 11: It is you must ‘wear the trousers’ now .
[UK]P. Bailey Eng. Madam 29: She wouldn’t have worn the trousers. She was quite submissive.
[US]Indianapolis Star (IN) 10 July 2/4: You only have to think about the pejorative phrase ‘she wears the trousers’.
[UK]Guardian Editor 28 May 11: There are corners of my life where I still wear the trousers. Not many, but a few.
[UK]Guardian 10 Jan. 17: From now on I wear the trousers in this relationship!