1 definition by I'm that nigga in the alley

MJFin

MJFin is when a person u know is uncontrollably shaking becus either he or she is nervous or theyre just wierd. MJF clearly stands for michael jay fox. its pretty fucked up . but wutever

me: Angie ur MJFin like ma balls.
Angie: < dead cus she ended up having a seizure

by I'm that nigga in the alley February 1, 2009