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2.
getting upset over something that might only be upsetting to you; a freak-out attack
Where in the hell is my boyfriend, I'm jappin' out; and I'm gona snap and jap on him.
by fraase April 15, 2008
 
1.
When another person snaps(or yells) at another
"Don't start jappin at me"
by Marianne Hanna November 24, 2003