Top Definition
When someone steals your joke and uses it to get their own laughs.

Lisa: "Man, Tracy Jordan is so stupid-smart!....I just made that up!"


John: "I've been using stupid-smart all day, and BTW, I just submitted it to the Urban Dictionary!"

Lisa: "WTF?! You totally laugh-jacked me!"
by dubble-dee March 31, 2011
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