look up any word, like half chub:
 
1.
Either:

a. Sleeping with three different women in the same day or

b. Sleeping with one girl and putting it in all three holes (oral, vaginal, anal) in one session
"John slept with Sally, Rachael, AND Krista today...way to pull The Hat Trick J!"

"Krista let me put it in all three last night...That's the Hat Trick for ya"
by IRA PKP January 30, 2006
 
2.
Sleeping with three different women in the same day
Homie: damn nigga, I'm so tired...
Ol boy: what happened?
Homie: pulled the hat trick and nearly broke my back. Doing that daily is a workout

Ol boy: damn, you getting it in like Flynn
by dt. August 14, 2011