look up any word, like blumpkin:
 
1.
a mother and daughter threesome
Dude, have you seen meggie's mom? Hells yeah, I think Dustin is working on the sportsman's double!

by Richard Rickleson May 15, 2007
 
2.
A threesome with a guy, a mother, and her daughter
The MILF from work invited me over Friday night. We were having some drinks and then, her even hotter 20 year old daughter came home and joined us! I did a sportsmans double with both of them!!!
by Krakoon May 21, 2007