Yo hairline so ugly even Bob the Builder said he couldn't fix it.
Bob the Builder Hairline
Explanation
Explain Bear
Listen up, buttercup. This "joke" is saying someone's hairline is so messed up that even Bob the Builder, a cartoon character known for fixing things, couldn't repair it. It's a roast, see? And you, my friend, probably have a hairline that's receding faster than your brain cells after hearing this joke.