Profanity is pretty infrequent in Marvel movies considering that they're trying to appeal to children here, so aside from the odd over-their-head joke (like the Jackson Pollock gag in Guardians of the Galaxy), they tend to keep the adult content low. There are a few notable swears in Ant-Man, though: the "steal some stuff" line from the trailer is actually "steal some s***" in the final movie (and both Pym and Lang say it), and at the very end of the movie, Pym tells Lang, "You're full of s***". The most unexpected swear comes from Dave (T.I.), a member of Lang's heist team who, when Scott refers to himself as a cat burglar, jokes that he's a "pussy". It's a strange, out-of-place moment, but again, subtle enough that the film just about gets away with it.