When friend will not leave you and a member of the opposite sex time alone. Thus causing frustration.
See also cock block
Dude Dirkamo Dustin is such a game kill!!!
some one who comes un-invited to places where people do not want this person. A loser who watches movies all day and goes on myspace because no one wants to be around him/her
Dustin ross came to mcdonalds un-invited so we had to leave because he is gay and no one likes him(GAME KILL)