a fagshag is when u fuck doug....he is the gayest fucking moron in the world....hence if u fuck (or shag) doug, it is a fagshag because u are shagging a fag.
"oh my gosh i heard u had a fagshag. now i feel like throwing up becuase doug is a disgusting little fuck."
by Max Dumitru January 26, 2005
by Sean Bhaskar January 17, 2005