look up any word, like blumpkin:
 
1.
When your tee- shirt is too tight and you either

A) have someone pull your shirt as you walk away.

B) Put your shirt over your knees sitting with your knees up to your chest or indian style.

(my mom made this up)
Can you Boinga my shirt, it's too tight on me.
by Urban Exxplorer July 23, 2010
 
2.
Boinga is a word used as an exclamation.

It can also be said when slapping, flicking, smacking, or grabbing someones ass or other private area. Boinga!!
Dude, I can't wait to go to Vegas, Boinga.

BOINGA!!! (Grabbing someones ass)

by Howieizme December 29, 2005