To vehemently insist you are right about something, only to discover you are shamefully wrong.
From Hebrew: יצאת חומוס
you: Listen, I know Pam did Playboy a few times, but that does not mean she has a sex tape.
you: Dude. No f'ing way!
them: See Wikipedia for Pam Anderson
you: mm. ok.
(you exit humus)