(a phrase taken out of The United States foreign policy):
a phrase meaning: as long as I have a
common enemy with a given person and I
will take the risk that this friend of
mine might betray me later.
Jason:
James my
man, why the heck are you friends with Robert? He convince you and Alison to break up and the took Alison's virginity anyways.
James: Listen, my enemy's enemy is my friend. What I mean is, Alison and I were already having relationship issue before Robert became a regular at the bar where she then worked. Not only that but Robert and I had a common enemy, whose name is Carl, and we became friends before the whole affair with Alison simply Robert hates Carl because Carl stole his
car. And I hate Carl because he borrowed money from me to pay rent on a stupid storage locker and never bothered paying me back.
Jason: so now the you and Robert want to gang up on Carl? and you
don't care about Robert betraying you? wtf?
James:
Don't know yet, but Robert and I became friends because we did have a common enemy, Carl. and I
don't care about Robert's betrayal, because I took that risk when I became friends with him.