Your mama is so stupid. She fell off a bike and didn't know which way to fall!
Yo Mama Bike Fail
Explanation
Explain Bear
Alright listen up, buttercup. This "yo mama" joke is all about how dumb your mom is. She's so thick, she can't even figure out how to fall off a bike. Falling off a bike ain't rocket science, but clearly, your mom's brain is running on fumes. It's an insult, plain and simple, designed to make you feel bad about your mom's supposed lack of intelligence. You probably like this joke because it's simple and insults someone else.