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1.
A necessary step in blowing bubbles, especially while underwater. The pelvic whoo involves thrusting your pelvis forward while jumping and saying, "WHOO!" It is also advisable to land on your right foot.
Spongebob: Patrick, don't forget the pelvic whoo!
by Jonathon B. February 05, 2008
 
2.
A pelvic whoo is a necessary step to blowing bubbles according to the technique taught by Spongebob.
"Squidward! Don't forget the pelvic whoo!"
by Jonathon B. February 04, 2008