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The woman whom gave birth to you and/or raised you.

Also, a retarded way to say "Your mother" as a snappy comeback.
"Hey man, can I get some of jomoma's breast milk?"

"Sure dawg."

Man 1: "Hey man, you're so damn FAT!"

Man 2: "Fat Jomoma."
by Wackles January 14, 2010
a stupid way to say yo moma as an insult
dude: oooh jo moma so dumb
other dude: shut up dumbass
by PlayDohMan July 05, 2004