When one works really hard on an essay and it turns out to be total crap.
Guy1: Wow, I spent like an entire week writing that essay and I got C! I got totally essay-rapped
Completely defeated or "owned" at something.
Guy1: How did your basketball game go?
Guy2: We got beet 2 to 47
Guy1: Wow, you got totally rapped.
Sometimes used as a sarcastic response to a dumb trick. Or a trick meant for noobs.
-Guy1: Hey guys! If you post your credit card and social security number, this forum will out automatically censor it!
-Guy2: Okay... Wait! I see what you did there.