A word (not words) exclaimed when you are in an angry group of people to add your anger into the situation. The expression may also be used to proclaim joy in some situations. Often times the group becomes awkwardly silent or bursts into laughter upon hearing this remark.
(Jeff's teacher assigns assload of homework)
James: THIS IS BULLSHIT
Randy: What the hell!?
Todd: AHH! Fuck me!