A boy you should not be associating with, or are supposed to hate, yet you do anyway.
(At a football game)
Kate: "Hey, see that cute guy on the other team? I wanna go talk to him!"
Shaniqua: "No Kate, we don't do that in this house. You don't need everybody else to hate another boyfrenemy of yours."

i.e. Boy from rival school, organization, outside your social circle, etc.
by Seiling Phan April 16, 2009
Get the Boyfrenemy mug.