Explore our great collection of knock knock jokes that have the response 'Tuba' to the classic prompt, 'Who's there?
Knock, knock!
Who's there?
Tuba.
Tuba who?
Tuba Crest toothpaste.
Knock, knock!
Who's there?
Tuba.
Tuba who?
Tuba or not tuba, that is the question.
Knock, knock!
Who's there?
Tuba.
Tuba who?
Tuba Two - I told you to keep in line!