peed off

Etymology 1
From pee off.

Etymology 2
Either from the verb sense (above), or directly from pissed off (pee being a euphemism for piss).

Adjective

 * 1)  Annoyed, irritated, angry.
 * 2) * 1962, John Charles Wahlke, The Legislative System: Explorations in Legislative Behavior, Wiley (1962), page 109,
 * I was in business then. Some guy named Isidore Lubin sent forms all the time wanting to know what I was doing. I was peed off.
 * 1) * 1973, George Plimpton et al., Mad Ducks and Bears, Random House (1973), ISBN 0394488474, page 311,
 * Sandusky said, "Even if the team wins, Curtis will get peed off because we didn't win big; we just won."