Three Footer

A type of poop that when shitted comes out measuring 36" in length ans is normally not that thick as while shitting it forms a circle in the toilet bowl.

I've been trying to shit a Three Footer all my life.

Three Cats Back

A Macintosh user who is still using Mac OS X "Panther", in spite of there now being two newer versions (Tiger, Leopard)

Pal: Hey, you load up Leopard on your machine yet?

Me: Nope...you can call me Mr. Three Cats Back!

three dot's

refresh

I would have never known the three dot's mean refresh.

Three knuckle Betty

When a female uses any combination of fingers to insert three knuckles deep into her vagina.

My husband told me to send him a selfie of me doing a three knuckle Betty.

Three fingers

An unexplainable fear of Anthony Ramos

*holds up three fingers*
Person 1: I feel you, he scares me too

Three fingers

When you're in a fight with someone you put up three fingers, which means you have too big of a brain to talk to them.

Enemy: "You are ugly and stupid, no one will ever like you!"
You: *hold up three fingers*

Enemy: *walks away*
You: *feels very proud in self."

Three fingers

Shows a boy who is to nervous to reveal he has a small penis

Yo that boy got three fingers up