Best definition
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!!!”
Waloo: define #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”
Waloo: define #3
zero, nothing
1. to make a bid of zero, waloo

2. to bid zero, and take zero, waloo

3. a card game