Top Definition
A word used in conversation of siblings to complain about their mother. Comes from "mom" + "monster" = momster.
The momster is really angry tonight...
by Kitten123 July 10, 2005
A term of endearment for your dear mom.
"A puppy for Christmas?! Thanks Momster, it's just what I always wanted!"
by LaurenLEE December 16, 2008
What happens to mom after she counts to 3..
mom: "Do the dishes!"
you: "no"
mom: "1...2....3"
you: "uh-oh its the momster."
by ninj3hh June 10, 2015
An active member of the mommy mafia. (A mobster in the mommy mafia.)
"She's a new member of the West Oak Mommy Mafia - a momster in training."
by Regan and Lisa Brunsvold December 28, 2007
n. a social networking site for moms of teens and tweens powered by Family Circle magazine
Instead of joining facebook, I'm going to join Momster to connect with other moms like me.
by momstermanda January 07, 2010
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