Restless third-leg syndrome

1. The inability to control one's penis, and, therefore fucking everything in sight. Generally it is men who are afflicted with this disease.
2. An excuse whoring men give for being unfaithful.

"Baby, it's not my fault you caught me with the Maytag repair man in a 69! It's my Restless third-leg syndrome acting up".

Restless third-leg syndrome by BaJinxy August 29, 2007

the third leg 

The dick between your legs

The third leg is really long

the third leg by Bory_cory October 24, 2017

a third leg

"A third Leg" is often a term used to describe a man's large sized Penis.

"Ohh wow I heard he is so large, people say he has a third Leg".

a third leg by RabbleRabbble April 19, 2018

third legacy 

For a male or female to have a third leg that is a known be many and be loved and feared at the same time.

There goes Tammy right there, you know she's the one that has the third legacy.

third legacy by Tammy's bitch January 16, 2011

Third legger 

A person who is accepted to join into threesomes of multiple couples.

"You know Sena is not the typical girl you date. Perfect for couples wanting a third legger though."

Third legger by crecia April 4, 2024