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rolling on the floor laughing while spinning like a helicopter's blades.
Guy 1: Oh my god, is tom having a seizure?
Guy 2: No, he saw you naked and he can't stop roflcoptering.
by Scrubbie October 06, 2008
The act of laughing like a manic while spinning in circles with your arms out like propellers.
I roflcoptered when I saw someone roflcoptering.
by zlin February 07, 2011