This means penis. Tends to be only used by males.
look at his hu ha hu dangling out :/
by orrrritem8 November 24, 2016
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This is what Zero from Megaman X series say when him do 3 normal attacks.
HU! HA! HUUU!
HU! HA! HU!
Hu ha hu
by gsredoli September 10, 2017
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