What’s the difference between a dad and a boulder?
About 15 stone.
Listen up, buttercup! This joke plays on the double meaning of "stone." Normally, a stone is a big rock. But in the UK, it's also a unit of weight, like pounds. So, the joke is saying a dad weighs about 15 stone more than a boulder. Why is this funny? Because it's a silly comparison that makes no sense, kinda like your fashion choices.