Green’s Dictionary of Slang

bags n.2

[? bum bags under bum n.1 ]

trousers.

[UK] ‘Cuthbert Bede’ Adventures of Mr Verdant Green (1982) I 58: Just jump into a pair of bags and Wellingtons.
[UK]Sportsman 9 Apr. 2/1: Notes on News [...] The doctor [...] might have copied Elijah leaving his garment to Elisha, making this literary Jenkins present of his dilapidated ‘bags’.
[UK]Cythera’s Hymnal 74: A nasty old bugger of Cheltenham / Once shit in his bags as he knelt in ’em.
[Ind]‘Aliph Cheem’ Lays of Ind (1905) 93: He was publicly proud of his hats; / When he mentioned his bags, eloquent.
[UK] ‘’Arry on His ’Oliday’ in Punch 13 Oct. 160/2: The cut of these bags, Sir, beats Poole out of fits.
[UK]Punch 10 Jan. 6: Just look at these bags you last built me, Snippe! J’ever see such beastly bags in your life?
[UK]E.V. Page ‘It’s Enough to Make a Parson Swear’ 🎵 My bags are ‘baggy’ and I feel such a guy, / It’s enough to make a parson swear!
[Aus]H. Lawson ‘The Captain of the Push’ in Roderick (1967–9) I 187: That which tailors know as ‘trousers’—known by him as ‘bloomin’ bags’.
[Ind]Civil & Milit. Gaz. (Lahore) 27 Sept. 1/4: The Shiny, where [...] / You throw away a duster, and he [i.e. ‘the native’] makes a pair of ‘bags’.
[UK]Harington & LeBrunn [perf. Marie Lloyd] Salute My Bicycle! 🎵 [of ‘rational’ bloomers] I sometimes wish myself in rags / When the boys shout, ‘What cher, bags?’.
[UK]Binstead & Wells Pink ’Un and Pelican 153: He gazed depreciatingly at the ‘bags’ of the startling check suit he was wearing.
[Aus]Truth (Brisbane) 10 Apr. 5/2: Tyler used to wear six-guinea ‘STRIKE ME SIDEWAYS’ SUITS; the coats little longer than the vests, and the bells at the bottoms of the bags big enough to hold the Australian surplus.
[UK]Marvel 27 Oct. 390: It’s my bags. They are split from top to bottom.
[Aus]Sport (Adelaide) 27 July 14/3: ‘Why not get a suit where you get a pair of bags thrown in’ .
[UK]A. Lunn Harrovians 95: When I was a new man I once shoved twenty nosewipes down my bags.
[Aus]C.J. Dennis ‘The Dance’ in Rose of Spadgers 136: Wot sort uv tile an’ bags / Is them to wear?
[UK]R. Westerby Wide Boys Never Work (1938) 147: Just look at those bags – for Gawsake!
[UK]S. Jackson Indiscreet Guide to Soho 25: He was wearing a leather jerkin, flannel bags and heavy brogues.
[UK]Wodehouse Jeeves and the Feudal Spirit 31: A gang called the Black Shorts, who went about in black footer bags.
‘John le Carré’ Tinker Tailor Soldier Spy 233: He put on some old flannel bags and a sportscoat.
[US]L.K. Truscott IV Dress Gray (1979) 301: You knew it was a goddamn game from the first day when that guy told you to drop your bags.
OnLine Dict. of Playground Sl. 🌐 bags n. 1) trousers.

In phrases

beat the bags off (v.)

to overcome totally.

[UK]Partridge DSUE (8th edn) 61/2: ca. 1920–50.
howling bags (n.) [SE howl]

‘trousers of an extensive pattern, or exaggerated fashionable cut [...] when the style has been very “loud”’ (Hotten, 1860).

[UK]Hotten Dict. of Modern Sl. etc. (2nd edn) 92: bags trowsers. Trowsers of an extensive pattern, or exaggerated fashionable cut, have lately been termed Howling-Bags, but only when the style has been very ‘loud.’ The word is probably an abbreviation for b-mbags.
[UK]Kentish Gaz. 22 Nov. 2/5: Trousers [...] when of a large pattern, or the inflated Zouave cut [are] ‘howling bags’.
[UK]Exeter Flying Post 14 Dec. 8/4: In London West-end ‘slang’ trowsers a large or remarkable pattern are termed howling bags, and they heard of young men sticking their feet under the governor’s mahogany.