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1.
Is a phrase you use to tell people that your best friend had sex with your brother.
JENN YOU SLEPT WITH MY BROTHER!!!

did you hear jenn sixns?
by depressedcorpse@hotmail.com November 13, 2008
 
2.
when your best friend fucks your brother.
you slept with who?!?!sixns
by furferfurfair November 10, 2008