Top Definition
ISMP is the abbreviation for 'I shate my pants'.
It's chievly used to shortly respond when other people enquire about YFP.
Teacher: What's wrong with you, Eric?
Eric's friend: Yeah, what's YFP, dude?
Eric: ISMP.
by obesity8039 January 15, 2011
1 more definition
Is she mad pregnant?
Alice: omg ismp?
Stacy: she totally is mad pregnant
by zaddy boy March 05, 2009

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