Wachu is a slang for the words, "what are you.....?"
by geojjo April 22, 2016
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Wachu is the sound of Waluigi sneezing. It can also be used in similar context of the word yeet.
Waluigi: Wachu!
Wario: God bless you Waluigi.
Waluigi: Thanks. I Wachued myself so hard.
by Don’t_Wachu_On_Me July 10, 2019
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slang term for what are you doing, mainly used by mtown hoodrats.
Wachu Dern Niggah?

Yo D-Smit Wachu Dern tonight?
by Dat Niggah Albe February 24, 2010
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