A fork of Rural Dictionary
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".
a big fat cock that I would love inside of me
Girl: ouuu fuck daddy
Boy: you like how I’m fucking this pussy baby
Girl: yess daddy, you fuck me so good with your third leg