Knock Knock
Who's there?
Monty!
Monty who?
Montyzuma's revenge!

Knock Knock
Who's there!
Muppet!
Muppet who?
Muppet it up, what a mess!

Knock knock
Who’s there?
Mustapha
Mustapha who?
Mustapha wee before I wet my trousers!

Knock Knock
Who's there!
Nanny!
Nanny who?
Nanny one in there!

Knock knock
Who’s there?
Nick
Nick who?
Nick R Elastic!

Knock Knock
Who's there!
Oboe!
Oboe who?
Oboe, the toilets occupied!

Knock Knock
Who's there!
Ooze!
Ooze who?
Ooze made the seat all wet!

Knock Knock
Who's there!
Paul!
Paul who?
Paul the chain when you’re finished!

Knock knock
Who’s there?
Phew
Phew who?
Phew, what a stink, have you let one rip?

Knock Knock
Who's there!
Plums!
Plums who?
Plums me that you'll always flush the toilet!