He can't eat cheesecake.
He's lactose INTOLERANT.
The Big Bang Theory Season 1, Episode 16
- Building on that, I'm lactose INTOLERANT.
- No, I saw the menu, they have soy cheese.
The Big Bang Theory Season 8, Episode 21
- You're lactose INTOLERANT.
- I don't eat it, I think it's a good idea.
The Big Bang Theory Season 1, Episode 1
- Right. No. I'm lactose INTOLERANT.
- Right.
The Big Bang Theory Season 2, Episode 1
- Here. Have some pizza, sweetie.
- Penny, you know I'm lactose INTOLERANT.
The Big Bang Theory Season 3, Episode 6