Knock, knock.
Who's there?
Joe.
Joe who?
Jo Mama!
Knock, knock.
Who's there?
Joe.
Joe who?
Jo Mama!
Alright listen up, you knucklehead. This is a "yo mama" joke, but disguised as a knock-knock joke. "Joe Mama" sounds like "Yo Mama," which is a goofy insult. Your brain is so smooth, it probably took you 30 minutes to read this. Sheesh.
Hit man 996
:)