(someone) is pissed off at (someone)

Being "pissed off" means being quite angry.

I am so pissed off right now!

You get "pissed off at" a person, or "pissed off about" an idea which makes you angry:

Are you still pissed off at me about what I said this morning?

"Pissed off" is a slightly rough phrase, so avoid it in polite situations with people you don't know well. 

This phrase appears in these lessons: