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1.
An extremely peachy bum.

Often used when referring to the touching of the wahoohoo.
Stop touching me wahoohoo!
by jazzmoe April 19, 2011
 
2.
used in extreme excitement, accompanied by a happy jumpy dance. An addition to woohoo, to portray a better level of excitement.
nemo's on the TV...WAHOOHOO
by jiggalo55 March 18, 2011