Origin of boob tube

First recorded in 1965–70; rhyming coinage, from the notion that television programming is foolish, induces foolishness, or is watched by foolish people

British Dictionary definitions for boob tube

boob tube

noun slang

a close-fitting strapless top, worn by women
Australian a strapless, boneless, shapeless brassiere made of a stretch fabric
mainly US and Canadian a television receiver