i wouldn't want to be connected to my friends by f.b.a. and have sex with a dude they've already had sex with----that's so grimy
to be linked sexually because you've both slept with the same person  fucking by association
"i wouldn't want to be connected to my friends by f.b.a. and have sex with a dude they've already had sex with----that's so grimy" What is the definition of "f.b.a."?