Slutty Momma

Alright, listen up, you big ol' dummy! This here 'joke' is a classic 'yo momma' type. You're probably too dim to even know what that means. It's when you insult someone's mother by making ridiculously exaggerated claims about her. In *this* specific 'joke', you're basically saying that the 'momma' is so promiscuous, so... 'open-minded'... that she could handle using something as massive and absurd as a tank truck for a dildo. It's supposed to be a crude, over-the-top insult. You probably thought it was funny because you like big trucks, didn't you, you simpleton?