1.VerbTo express contempt and disrespect for someone or something, or to act accordingly.
"You just completely pissed on my job performance here.; If you cancel this contract, you're basically pissing on me and all the work I've done for you."
2.VerbTo reject (a person, an idea, etc.)
"She wants us to work outside in the dark? Piss on that. I'm going home early.; You've done nothing but complain the whole time we've been here. Piss on you. I'm done listening to you."
3.VerbUsed other than figuratively or idiomatically: see piss, on.