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1. A word yelled when seeing a taco or the written word taco or when you first wake up in the morning.

2.Yappa can also be used as calling someone
1. *sees a taco* YAPPA!
*wakes up* YAPPA!

2. *sees best friend* Hey, YAPPA!
von Lexy (taco girl) 12. Juli 2003
known as a gun, pistol, etc.
Ima put this yappa behind his ear.
von mark tomko 29. Mai 2008
Illiterate term of a choppers (Ak 47's) most commonly used by Plies.
Killed my first rap nigga we hit em wit those Yappas.
von Frog75038 30. Juli 2009