Green’s Dictionary of Slang

filthy adj.

[synon. dirty adj. (10)]

1. (US Und.) in possession of incriminating items, esp. drugs.

[US]C. Cooper Jr Scene (1996) 162: FBI, Tubbs. You’re under arrest [...] I bet you’re filthy, Tubbs.

2. (US campus) amazing, excellent [on bad = good model].

[Aus]K. Lette Girls’ Night Out (1995) 188: ‘Filthy waves,’ agreed Bodge. ‘Classic.’.
[Aus]T. Winton Lockie Leonard, Legend (1998) 17: Have you heard Storytime yet? Filthy good band.
Online Sl. Dict. 🌐 filthy adj 1. very good, excellent; COOL, AWESOME. (‘Those shoes are filthy!’).
[Aus]Sun-Herald (Sydney) 18 Jan. 29: The talent was filthy, the babes were lush and the mosh pit was going off.

3. (Aus.) sarcastic, ill-tempered.

[Aus]P. Vautin Turn It Up! 58: Don’t they get disappointed and filthy?
[Aus]R.G. Barrett Mud Crab Boogie (2013) [ebook] I was filthy on your giving me local anaesthetic.
[Aus]N. Cummins Tales of the Honey Badger [ebook] Needless to say, I was filthy. I told her I was already full anyhow and didn’t want them [i.e. stolen sweets].

4. (Aus.) sexy, thus used neg. as obscene, immoral.

[US]D. Jenkins Semi-Tough 236: ‘You better be an All-Pro in the rack, son, because you done got hold of yourself a po-ran-ah fish.’ I hope filthy little Linda has worn Dreamer’s ass full out by now.
[Aus]R.G. Barrett Wind & Monkey (2013) [ebook] Les followed Digger up the stairs, his eyes burning holes in her shapely little behind as it swished slightly from side to side under her filthy mini dress.
[US]E. Wald Jelly Roll Blues 3: ‘Pallet on the Floor’ is an exuberantly filthy sketch of an afternoon tryst between a hustling man and a workingman’s wife, played as raw comedy.

5. (Aus. teen) unacceptable, dishonourable.

[Aus](con. 1960s-70s) T. Taylor Top Fellas 69/1: It was considered absolutely filthy to use your boots. If you fought you fought clean.

In compounds

Filthy MacNasty (n.)

a nickname for an unpleasant man, esp. a ‘peeping tom’ or ‘dirty old man’.

[US]E. Anderson Thieves Like Us (1999) 120: If I ever catch old Filthy MacNasty peepin’ [...] I’ll kick his end clear off.
filthy pillows (n.)

the female breasts.

rtw132 Maureen’s Lusty Confessions 🌐 Please, please have a bit of giblet pie, while you fondle my filthy pillows. I have desires to bump uglies with you in my dreams, and I pray that my dreams may one day become a fantastic reality... Do you feel the same way??

In phrases

filthy (on)

(Aus. Und.) furious with.

[Aus]R.G. Barrett Real Thing 21: What had the boys absolutely filthy was to think that some prick [...] was going to kill the one person [...] who the boys genuinely loved.
[Aus]Smith & Noble Neddy (1998) 145: ‘The only reason that he has agreed is because they have decided to empty him [throw him] out of the taskforce. He is filthy on them and wants to even up with them.’.
filthy with [phr. filthy rich, but note filthy, the n. (1)]

full with, over-loaded with, usu. money.

Kincaid Dispatch (KS) 1 Aug. 5/2: Empty beer bottles [...] are the source of much satisfaction to these small boys, for selling the same keeeps him filthy with pocket money.
[US]Times (Philadelphia, PA) 25 Oct. 3/2: The Republicans [...] ‘are filthy with money’ and are spending it liberally.
[US]Salt Lake Telegram (UT) 25 Jan. 4/1: ‘Why, he’s filthy wif money’.
Montogomery Advertiser (AL) 18 Nov. 4/6: ‘In a few days I’ll be perfectly filthy with money’.
E. Sterne Road of Ambition 137: Just filthy with money—that’s their trouble—and the more they have the more they want.
[US]J.P. McEvoy Showgirl 163: Dough. She must be filthy with it.
[US]J. Archibald ‘Time Will Tell’ in Phantom Detective Sept. 🌐 There’s an old guy runnin’ a pawnshop [...] He’s filthy with dough.
[US]T. Marvin ‘College for Crooks’ in Ten Detective Aces Feb. 🌐 You been taught better than to lift goods in a depot. They’re filthy with plainclothes.
R.L. Tobin Center of the World 92: Smug, self-centred, patronizing, cityfied, smooth, and probably filthy with money.
in Stanton & Banham Cambridge Paperback Guide to Theatre 245: ‘I’m filthy with money,’ he confided, flashing his gross dress-ring.
S. Oglesby Riding High 230: Don’t ya worry, I’m filthy with money. I’m the uh, what’s the word, Maxie — eccentric type, right?