Wachu is a slang for the words, "what are you.....?"
Wachu doing? .... What are you doing?
19π 1π
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.
17π 2π
slang term for what are you doing, mainly used by mtown hoodrats.
Wachu Dern Niggah?
Yo D-Smit Wachu Dern tonight?
6π 2π