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1.
very useful latin american (especially Dominican) slang for stuff, crap, thingy, thingamabob etc.
Me gusta esta vaina! (I like this stuff!)

Donde encontraste esa vaina alla? (where did you find that thing over there?)
by Cathleen July 18, 2005
 
2.
-thing
-damn
-shit
Dame esa vania (give me that thing)
Que vaina (damn)
Esa vania (thats a shit)
by drzprincess April 24, 2008