Dirty words 'litter' his vocabulary. [=his vocabulary includes many dirty words; he says a lot of dirty words]
('chiefly US') a 'litter box' = ('Brit') a 'litter tray' [=a container holding litter for a cat]
Of all the cars on the market, this one is clearly 'the pick of the litter'. [=the best one]
(..) Mm-hmm. All right. Hey, want to have some real fun tonight? What do you say you and me get some female company for tonight? You can have your pick of the litter. Now, the important criteria to look for is who's DTF, who's holding weed or coke, and who makes your wee-wee tingle. (..)2016 TvShow: Shameless Title: Swipe, Fuck, Leave Season: 7 Episode 2