“Momsters” are hip, tattooed, irreverent, sex-positive mothers who care for their children with an alternative, holistic approach to parenting, often frowned upon by modern day June Cleaver clones.
Momster is when a scary and angry man does a satanic ritual and becomes what we call a momster. Momsters can be very dangerous but you will know when you meet one because they are sus as fuck.
(bob): You seem sus omg are you momster?
(momster): *eats him*
A mom who is emotionally and or physically abusive. She can be passive aggressive or a bully as well. Often puts her needs before her own children's. Has no regard for her child's overall health and well being.
My mom never comes to my volleyball games, she is such a momster.
My mom tells me I'm fat every morning, she is such a momster.
My mom would rather do drugs then feed my brother and I, she's a momster.