Wiktionary
fuck with
vb. (context vulgar slang idiomatic English) To mess with; to interact with in a careless or inappropriate way.
Usage examples of "fuck with".
He had a plan -- and a bus pass with four more days left on it -- so this son of a bitch had picked the wrong guy to fuck with.
And anyone who tried to fuck with his guns would feel a lot worse.
He had that same sense with a weapon, especially the 60 which he'd had to fuck with for far too long in the teams.
If you do, if you try to, pardon my language, fuck with him, you will end up sorry and sore.
In between orgasms he would let his mind dwell on some one else, so that when she'd start working on him again he might imagine he was having a brand new fuck with a brand new cunt.