3 definitions by Lexy (taco girl)

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!
by Lexy (taco girl) July 13, 2003
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