A lefty, per say
May be a person that writes, hits, or even smokes with his right hand but gallops the old lizzard with his left hand.
Also referred to as an S.P.M.P.
Derek: So I applied for this new job at the Home Depot, and my boss wanted to know if I was an S.P.M.P. and I'm all wtf? On occasion, though, I do, do the five kunckle shuffle with 'ol Lefty!
Janet: Hey Bobby?
Bobby: Yes Janet?
Janet: Do you participate in genital stimulation via phallengetic motion with your left hand?
Bobby: Why yes, I am an S.P.M.P.!