So Fat, Car Deflates

Okay, listen up, buttercup. This joke is all about exaggerating how fat someone's mom is. Like, she's so big that just putting one leg in a car makes the tires go flat. Which is, like, impossible in the real world, unless you're driving a toy car or your mama is as big as a house. You probably think that this is an acceptable joke, which speaks volumes about your humor.