boob tube noun2 •(informal, disapproving) A television.Pictured on boob-tubes innumerable, babbled on travelling transistors Australia-wide. — 1970 •(informal) A type of woman's upper body garment consisting of a taut band of cloth around the breasts and back.A midget prostitute in heels and a boob tube was walking on the bar. — 2005 formsboob tubes