My compilation of ""Knock, knock"" jokes. *Knock, knock.* Who's there? *Knock, knock.* Knock, knock who? *I am knocking.* ------- *Knock, knock.* Who's there? *Doctor.* Doctor who? *Correct.* -------- *Knock, knock.* Who's there? *Woo.* Woo who? *It's just me, no need to get so excited.* -------- *Knock, knock.* Who's there? *Horton hears a.* Horton hears a who? *Correct.* -------- *Knock, knock.* Who's there? *Hoo.* Hoo who? *Lol are you an owl?* ---------- Submit your ""Knock, knock"" jokes below!