Top Definition
A combination of the obscene phrases mother fucker and son of a bitch.
A: I just broke your mirror.
B: Son of a Mother!
by Mike Hayes January 15, 2004
A polite way of saying son of a bitch in front of children.
You stub your toe in front of your daughter "ooooh son of a mother"
by Smart assy and sassy May 15, 2016
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