Dialogue you could use instead of the word…

Off

Specifically to mean obscene

Barnyard

Bawdy

Blue

Crude

Dirty

Filthy

Flagrant

Gross

Gutter

Indecent

Indecorous

Immodest

Lascivious

Leering

Lewd

Locker room

Nasty

Naughty

Obscene

Off colour

Pornographic

Porny

Prurient

Racy

Raunchy

Ribald

Risqué

Rotten

Scurrilous

Smutty

Stag

Suggestive

Trashy

Unpublishable

Unspeakable