
...with a chicken-carbonara SUB
at Quizno's.
The Big Bang Theory Season 1, Episode 3

It just said "Italian SUB."
The Big Bang Theory Season 9, Episode 21

I want to take a one-man SUB to
the lowest depths of the ocean.
The Big Bang Theory Season 5, Episode 5

No, a party SUB implies it's a party.
The Big Bang Theory Season 9, Episode 21

The coefficient isn't lambda.
It's lambda SUB one.
The Big Bang Theory Season 10, Episode 20