
Don't blame me, blame your PAL biology,
The Big Bang Theory Season 10, Episode 5

Thanks, PAL.
The Big Bang Theory Season 2, Episode 13

You're a real good PAL.
The Big Bang Theory Season 12, Episode 2

Hey, PAL.
The Big Bang Theory Season 3, Episode 6

But you can PAL around with a hagfish?
The Big Bang Theory Season 9, Episode 9