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."
a fag, like DOUG, he is the biggest fag in the world, DOUG YOU ARE A FAGSHAG!!!
Doug is such a Fagshag!! I cannot belive how much of a fagshag he is!!