Green’s Dictionary of Slang

sticky adj.1

1. (US) mawkish, sentimental.

[UK]M. Scott Cruise of the Midge 191: Nonsense – to be sure it is all nonsense – regular moonshine [...] what a melancholy report we shall have to make to Sir Oliver! but give us some grog, Lanyard, you sticky old villain.
[US]Ade Girl Proposition 73: He thought she was so Sticky on him that everything he did looked good to her.

2. of weather, muggy.

in Funk’s Standard Dict.

3. of a person, awkward, uncooperative, punctilious, prone to cause trouble.

[UK]L. Troubridge Life amongst Troubridges (1966) 162: Rather a sticky audience who evidently thought it vulgar to laugh, and only sniggered into their pocket handkerchiefs.
[UK]T.E. Lawrence letter 3 Nov. in Garnett Letters (1938) 486: I’ve got too many subscribers, so am very sticky over these last copies.
[UK]Wodehouse Luck of the Bodkins 34: He didn’t actually call me a waster [...] but his manner was sticky.
[UK]Graves & Hodge Long Week-End 135: Even the stickiest British families seemed ready to abandon their mistrust of the cinema, if the vulgar American scene could only be replaced by a wholesome British one.
[UK]P. Hamilton West Pier (1986) 198: We haven’t got the car tonight. Old Gosling’s a bit sticky about it.
[UK]H.E. Bates A Breath of French Air (1985) 155: I thought you were going to be a bit sticky about me and Ma. I don’t know – bit awkward. Were you?
[US]J. Havoc Early Havoc 229: Your sister [...] knows how sticky you are about where she works.
[US]A. Maupin Tales of the City (1984) 208: People are sticky out here about privacy, you know.
[Aus]B. Humphries Traveller’s Tool 27: Young Craig, like all brilliant kids, went through a sticky patch.
[US]D. Hecht Skull Session 300: The sticky one was Rizal.

4. of circumstances, awkward, presenting great difficulty, disagreeable because of hardship or danger.

[Aus]Kia Ora Coo-ee 15 May 11/1: Captain Oliver Hogue (‘Trooper Bluegum’), [...] was born in April [....] 1880, so he is quite old enough to realise that war is a sticky business.
[UK]E. Raymond Tell England (1965) 282: It’ll be the stickiest thing we’ve had for some time.
[UK]Wodehouse Right Ho, Jeeves 7: No wonder he finds the going sticky.
[UK]N. Marsh Death in Ecstasy 133: It’s a sticky business, this.
[UK]C. Day Lewis Otterbury Incident 110: Suppose the flatfeet got to hear of it? Sticky look-out for young Ted, eh?
[UK]W. Hall Long and the Short and the Tall Act II: It’s a sticky number as it is. We’ve got to go right through the lot of them.
[UK]B. Kops Dream of Peter Mann Act II: My knight is in a sticky position.
[UK]D. Nobbs Fall and Rise of Reginald Perrin (1976) 99: With luck they‘d miss most of their pre-dinner drinks. That was always the stickiest time.
[US]C. White Life and Times of Little Richard 163: The promoters had told me that ticket sales were a bit sticky.
[UK]Indep. Rev. 4 Sept. 20: But things turned a bit sticky.
[US]T. Udo Vatican Bloodbath 34: Rumoured to have God on his side and to be able to count on divine intervention when he got into sticky situations.
Star (Jamaica) 13 Nov. 🌐 Ninja Man co-accused. Comment [...] As dem seh inna di rum bar ‘It look sticky’.
[UK]T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Sticky - dangerous.
[UK]G. Krauze What They Was 276: Unless you want it to get real stick, you need to let off with the keys.

5. of a social function, slow to start, stiff, uncomfortable.

[UK]V. Sackville-West Edwardians 17: ‘What was Miriam’s party like, Lucy? Sticky, as usual?’ ‘No,’ said Lucy, ‘quite a good party for once’.
[UK]B. Pym Excellent Women (1994) 265: I remembered many sticky church functions which might have been improved if somebody had happened to open a bottle of wine.
[UK]R. Cook Crust on its Uppers 113: It looked like the beginning of a sticky couple of days.

6. unpleasant.

[UK]D.L. Sayers Nine Tailors (1984) 265: If ever a fellow deserved a sticky death, it’s this Deacon brute.
[UK]Hastings Obs. 18 Jan. 6/2: What about all the rabbits [...] that got a reprieve from a sticky end by the death of this one fox.
[UK]D. Farson Never a Normal Man 315: The young man was bound to come to a sticky end because he lived too fast.

7. pertaining to (commercial) sex.

[UK]J.J. Connolly Layer Cake 23: A kinda armchair arrangement that’s been made outta boxes of sticky books and sex aids.

In compounds

sticky wicket (n.) [note UK cricket jargon sticky wicket: a damp, therefore soft pitch on which the ball can perform unpredictably]

(US campus) a difficult or embarassing situation.

[US]R. Starnes And When She Was Bad 162: I was convinced by now that we were batting on a sticky wicket.
[US]Wisconsin State Jrnl 17 Jan. 1-2: If just one of the couple is a short-hitter, this is likely to lead to a sensitive situation or something termed ‘sticky wicket’.
[US]M. Ribowsky Don’t Look Back 73: [T]his strange love affair [...] promised to—if not solve—at least distance this sticky wicket.

SE in slang uses

In compounds

sticky spud gun (n.) [the ejaculated semen]

the penis.

‘ShadowKnight’ EliteFitness.com Forum 26 Aug. 🌐 sticky spud gun.
sticky stuff (n.)

(US) semen.

[US]‘Bob Sterling’ Town-Bull 24: ‘I like the sticky stuff; like to be plastered with it all over’.
[UK]‘Ramrod’ Nocturnal Meeting 16: It’s shooting a lot of warm sticky stuff into my hand.