the.com/washtub bass

means A homemade stand-up bass made from an inverted washtub, a broomstick, and a single taut string, plucked to produce a deep, thumping pitch that can be bent by flexing the stick.

from Its roots run through jug bands and skiffle music — early 1900s American folk traditions born of poverty and improvisation, where musicians built instruments from whatever was lying around the house. The washtub bass descends from a lineage that stretches back to African and African American one-string instruments like the diddley bow, reworked with the tin washtub that happened to be sitting by the back porch. It later got a second life in 1950s British skiffle, where kids with no money and a lot of nerve turned laundry equipment into a rhythm section.