WAH-wahs
This is the repeating "whomp whomp whomp"sound that you can get from doing whip-its. Kind of like when a guitarist uses his whammy bar on a long note when your head is really close to the speaker. Its actually hypoxemia from low levels of oxygen mixed with other gases (in this case a propellant called nitrous oxide) in your blood stream.
I heard about this guy who did crazy shit to get the Wah-wahs. He even robbed a dentist office to go scuba diving.
Get the WAH-wahs mug.