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1.
The male mother that supplied his seed to your female mother's field of life.

Synonyms: dad, father, padre
Friend: Dude can we hang out today?

You: Can't, my manmom has me doing chores all day... *sadface*
by Chrizzizzippi February 22, 2008
 
2.
mom that looks/sounds lik a man

or

two lesbian women and oune decides to be called a man mom instead of the child having a dad
i am a man mom!
by urmom.comohhhhhhhhhhhhh July 12, 2008