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The female version of mancave. Although the word itself implies motherhood, the woman doesn't necessarily have to be a mother.
Whipped Husband: What the hell happened to my mancave!?
Wife: It's now a momcave.

Whipped Husband: Yes, Dear.
by ThaBigCheesy October 13, 2010
a gender-specific retreat, patterned after the "man cave," but with creepy Oedipal undercurrents.
"I just discovered a secret mom cave at home."
"Don't tell anyone or they'll put you on the couch and pump you full of Prozac for the rest of your adult life!"
by Starkeyzz November 09, 2013