Verb
(vulgar, slang, idiomatic) To interact with in a careless or inappropriate way.
Don't fuck with that gang! They all carry guns!
(vulgar, slang, idiomatic) To play with in a lighthearted or joking manner; or kid with
Don't take it serious, man, I'm just fucking with you.
(vulgar, slang, idiomatic) To affect seriously or disturbingly; to trouble
The thought that she might be cheating on me is really fucking with me.
(vulgar, slang, idiomatic, especially African-American Vernacular) To work or associate with, roll with, have dealings with; (by extension) to like, approve of, enjoy.
I fuck with you heavy.
I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes: If you fuck with me, I'll kill you all. James Mattis
Bodies like wrecking balls fuck, fuck with dynamite. St. Vincent (musician)
I believe in being warm-hearted. I believe especially in being warm-hearted in love, in fucking with a warm heart. I believe if men could fuck with warm hearts, and the women take it warm-heartedly, everything would come all right. It's all the cold-hearted fucking that is death and idiocy. D. H. Lawrence
I'll show you some security and I'll show you some peace: Nagasaki and Hiroshima. You fuck with us and we'll fucking melt you. Ted Nugent
"You think you can get away with murder / You don't know who you're fooling with / I'm going to shoot you with my BB gun" - Fuck With Me and Find Out. Wesley Willis
You fine and I dig your style Come fuck with a Nigga Do it Doggystyle I'll be gentile, sentimental Shit, we fucked in a rental. Snoop Dogg