filthy has definitions from the field of sexuality
1
[ adjective ] disgustingly dirty; filled or smeared with offensive matter

Synonyms

nasty foul

Examples

"as filthy as a pigsty" "a foul pond" "a nasty pigsty of a room"

Used in print

(William G. Pollard, Physicist and Christian....)

I hear the boot of Lucifer , I see his filthy face '' !

(John Dos Passos, Midcentury....)

And there I was shacked_up with Eileen in that filthy fourth floor attic on Hudson_Street .

Related terms

dirty

2
[ adjective ] vile; despicable

Synonyms

dirty lousy

Examples

"a dirty (or lousy) trick" "a filthy traitor"

Related terms

nasty

3
[ adjective ] (informal) thoroughly unpleasant

Synonyms

vile nasty foul

Examples

"filthy (or foul or nasty or vile) weather we're having"

Related terms

colloquialism inclement

4
[ adjective ] (sexuality) characterized by obscenity

Synonyms

nasty smutty foul

Examples

"had a filthy mouth" "foul language" "smutty jokes"

Related terms

dirty

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