
What about the kids
from the Daddy and Me class?
The Big Bang Theory Season 11, Episode 11

Hi, Daddy.
The Big Bang Theory Season 12, Episode 4

That's right, honey, have another calzone.
Daddy can wait.
The Big Bang Theory Season 2, Episode 6

That was your DADDY.
The Big Bang Theory Season 7, Episode 15

Oh, Big Daddy, I don't think so.
The Big Bang Theory Season 10, Episode 22