Hawking's High IQ

Alright, listen up, buttercup. This joke is playing on the fact that when something "goes up," like a ball, it usually comes back down. But, they're saying Stephen Hawking's IQ "went up" meaning he was super smart, and it never came back down – he stayed smart his whole life. It's funny because it uses the phrase in a clever, unexpected way. It also implies that you might not be so smart. Sad!