Rub-a-dub-dub is a nursery rhyme.
Rub-a-dub-dub may also refer to: Rub-a-Dub-Dub (TV series), a 1984 animated series Rub-A-Dub-Dub (novel), by Robert Wringham "Rub-A-Dub-Dub" (Hank Thompson song) "Rub a Dub Dub", a song by The Equals
See also Hey Rub-a-Dub-Dub, a collection of essays by Theodore Dreiser Rub-a-Dub-Tub, a 1983 children's television series