Green’s Dictionary of Slang

freaky adj.1

[freak n.1 (2) + sfx -y]

1. odd, bizarre, unnerving.

[US]DN I 417: Freaky. Queer, improper.
[US]Wash. Post 3 July 3/4: About the freakiest thing I know about Bostonians is that they never get quite so interested in them [i.e. sideshow freaks] unless they’re convinced from the start that they’re phoney.
[US]S. Lewis Main Street (1921) 123: I think that a St. Patrick’s Day party would be awfully cunning and original, and yet not too queer or freaky or anything.
[US]N. Algren Neon Wilderness (1986) 256: She’d tried to henna the stuff [...] but it only made the platinum pompadour look streakish and freaky.
[US]‘Hal Ellson’ ‘I Didn’t See a Thing’ in Tell Them Nothing (1956) 140: Who’s that freaky creature?
[US]H. Selby Jr Last Exit to Brooklyn (1966) 52: Next time we will be alone and he can be as freaky as he wants.
[US]E. Torres Carlito’s Way 87: Rivas was a stone degenerate but he sure could dig up some freaky broads.
[US]C. Hiaasen Skin Tight 273: Which one do you want, Al? The freaky hit man or the doctor.
[US]P. Cornwell Point of Origin (1999) 331: That’s another freaky thing.
[UK]Guardian Editor 14 Jan. 10: I like freaky shit.
[UK]A. Wheatle Dirty South 67: It was kinda freaky to see all those little versions of Red Eyes running around the place.

2. (drugs) hallucinogenic, psychedelic.

[US]L. Wolf Voices from the Love Generation 81: The vibes are so freaky [...] There [are] colours, sounds, things like that.
[UK]I. Welsh Trainspotting 156: This gear is pure freaky though.

3. (drugs) strong, powerful.

[UK]M. Novotny Kings Road 95: ‘This is a freaky spliff,’ said Les, holding the joint out to Tricesta.

4. nervous.

[US](con. 1967) E. Spencer Welcome to Vietnam (1989) 36: Battalion is always freaky when we are out on patrol [...] you’d swear they were getting hit when, in fact, we are.

In compounds

freaky-deaky (adj.)

(US) weird, bizarre.

[US]E. Leonard [bk title] Freaky Deaky.
[US]R. Shell Iced 14: A freaky-deaky theater place where the actors and actresses walked around naked as a matter of course.
[US]Allecto ‘Buddy Fuck’ [Internet] Justin slung an arm around Wade’s shoulder. ‘Wade’s been getting freaky-deaky,’ he said.
freaky deal (v.)

(US) to cheat, to deceive.

[US]W.T. Vollmann Royal Family 644: They all smoke. They all freaky-dealin’ with me an’ with each other.
freaky-freak (n.) [freak n.1 (2)]

an eccentric; also used as a term of affection.

[US]College Sl. Research Project (Cal. State Poly. Uni., Pomona) [Internet] Freakyfreak (freakyfreak of the week) 1. (noun) Someone who is really strange. 2. (vocative) A term of affection used between friends.
freaky-straight (n.) [straight n.2 (1)]

a person who either looks ordinary but behaves unusually, or one who looks unusual but behaves normally.

[UK]Gandalf’s Garden 6 n.d. 10: freaky-straights: either ordinary-looking people with fanatical ideas on one particular theme, like the ‘Flat Earth Society’, or people whose appearance is very weird but whose minds are channelled into one usual line of thought and on all other subjects their thinking is just as stereotyped as ‘Mr. Average’. The lack of light in the eyes betrays the freaky-straight.