look up any word, like trill:
 
1.
1. The predecessor of the Otter Dance.
2. An expression of joyful emotions.
3. The native sound of the Sobel habitat.
"Well I say governor, WALOO!!!"
by gamerdank420 September 15, 2008
 
2.
1. The sound of a Sand Creature (Opi) on Family Guy's Blue Harvest version of Star Wars.

2. The sound high people make when the hear and/or find something amazing.
1. jdork: "There's a roach in the ashtray, WaLOO"
by jdork92 August 13, 2010
 
3.
zero, nothing
1. to make a bid of zero, waloo
2. to bid zero, and take zero, waloo
3. a card game
by California big Mike December 28, 2008