
Tell your boyfriend
to cool it with the COW jokes.
The Big Bang Theory Season 4, Episode 9

Except they leave room
for a COW. (chuckles)
The Big Bang Theory Season 5, Episode 20

Now, while commonly known as a COW catcher,
I prefer the more accurate "COW exploder."
The Big Bang Theory Season 8, Episode 21

Do not tell me about my culture.
I'll take you out, I swear to COW.
The Big Bang Theory Season 3, Episode 4

or mad COW disease in my
grilled cheese sandwich?
The Big Bang Theory Season 5, Episode 16