|1.||i lost my shit|
(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"