The middle man in a threesome involving three men. One who is both being penetrated analy while penetrating another analy.
Jason was the lucky peter in our gay threesome.
by questions October 08, 2007
1 more definition
The middle guy in a gay man threesome.
While giving it to Ted and recieving it from Joe, Johnathan knew he truely was the Lucky Peter.
by Keithinator March 12, 2009