Top definition
I:

MOTHER
FUCKING
SON of a
BITCH

II:
mother
father
sister
brother

-classic musical act
MOTHERFUCKING SON OF A BITCH!

MFSB... whatever happened to them?
by Bravely Folk December 23, 2003
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2
That guy over there is a MFSB!
by DuckyD1000 June 02, 2011
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