A COLON calling card, if you will.
The Big Bang Theory Season 6, Episode 9
HOWARD: If I push any harder,
I'm gonna give birth to my COLON.
The Big Bang Theory Season 1, Episode 14
You didn't say they couldn't pass through
my COLON first.
The Big Bang Theory Season 8, Episode 18
Oh, yes. In the world of emoticons,
I was COLON, capital D.
The Big Bang Theory Season 3, Episode 1
...a clean COLON is just one less thing
to worry about.
The Big Bang Theory Season 1, Episode 1