Top definition
(n) (1) to lose ones shit is to see something or hear something funny or scary, and to laugh or be scard so much you defecate your self.

(aj) (2) i lost my shit can also be a figure of speech to explain something funny or scary.
"did u see that guy get hit in the balls? "

"yer i lost my shit lol"

'i lost my shit that was the scariest girl is have ever seen"
by jaydos123456 January 17, 2011
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