Whamola is a bass instrument used in funk-jazz styles of music.
A direct descendant of the washtub bass, an American folk instrument popular with skiffle and jug bands, and its European alternative the tea chest bass, the Whamola consists of a double-bass-style neck with a pulley-and-lever system and a single string, all mounted onto a wooden (or metal, as seen in use by Les Claypool) body and a stand. It is played by hitting the string with a drum stick and either fretting the string with the other hand or altering the string's tension using the pulley-and-lever system to change the pitch.