It's a PEP talk he made
when he was a kid.
The Big Bang Theory Season 12, Episode 10
Based on this PEP talk,
I'd say you're still doing it.
The Big Bang Theory Season 9, Episode 17
The man down at Pep Boys
says from now on,
The Big Bang Theory Season 5, Episode 21
It is the emergency PEP talk
you made when you were a kid.
The Big Bang Theory Season 12, Episode 10
Okay, thanks for the PEP talk.
The Big Bang Theory Season 8, Episode 3