Woohaa, as can be heard in Linkin Park's "Forgotten" is a word used for exclamation, joy, or used as a word instead of a vulgar or socially unacceptable term.
I walked in on my mom giving my dad a woohaa last night.
by Bitches and Hoes June 20, 2004
an exclaimation of joy
that was awesome! Woohaa!
by Nick Dogg September 11, 2003