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3.
The sock you jerk off into. The reason you're mom only finds odd socks in the dryer
Mom: look the dryer ate another sock.

You: no, that's my happy sock!
by Choda Warrior November 18, 2009
 
1.
n.

1. A mans favorite sock which he uses for masturbation.During masturbation, the sock catches the ejaculation which prevents a messy episode. Originating from some guy name Happy.
I want to spank my monkey. Have you seen my happy sock?
by bigjlj January 28, 2006
 
2.
noun.

A sock used by a soldier to masturbate and ejaculate into so the process of clean-up is more efficient.
Dude, I totally found Spec. Stockman's happy sock in my laundry and now my pants are all stained.

Sarge told me to get a happy sock, and quit getting the linens all sticky.
by SuzaK March 18, 2006
 
4.
A catnip toy made by taking an unwanted sock and stuffing it with polyfil and catnip. Thousands of Happy Socks are made every year and donated to homeless cats at animal shelters in the U.S. and internationally.
A catnip toy made by taking an unwanted sock and stuffing it with polyfil and catnip. Thousands of Happy Socks are made every year and donated to homeless cats at animal shelters in the U.S. and internationally.
by The Happy Sock Lady July 25, 2009