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The word you use for someone close who betrays you. It stems from "Mom"(meaning someone close/that you trust), and "Opp"(meaning your enemy).

Other forms are Momopped/Momoppin/Momopper/Momopps.
Gavin: Hey, there are cashews in this trail mix!

Ellis: Aren't you allergic to those?

Gavin: Yeah, and my mom packed them.

Ellis: She's Momoppin.
Momopp by ItsReborn October 23, 2022
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Momophobia 

The fear of speaking off the cuff or from the heart, the terror of having to say the wrong thing and watch someone's smile fade as they realize you aren't the person they thought you to be
Why do I have such momophobia around her.
Momophobia by Bluhmie December 14, 2021
To Momopp. Originating from "mom"(someone you trust/that is close to you) and "opp"(your enemy).
Gavin: I heard you broke up with your girlfriend.

Ellis: Yeah, I don't wanna be with anyone that Momopps.
Momopps by ItsReborn October 23, 2022

Momopper 

Someone who Momopps. Originating from "mom"(someone you trust/that is close to you) and "opp"(your enemy).
Gavin: I cut your brakes without telling you.

Ellis: I've known you for years, how can you do this?

Gavin: I'm just a Momopper.
Momopper by ItsReborn October 23, 2022
Moping around while mopping up your broken hopes and dreams. Typically occurs after being rejected from your favorite college or after a breakup. Pronounced mo-pope-ing.
I'be been mopopping all day after Harvard rejected me.

Jack has been using mopopping for weeks after Stacy broke his heart -- even Tinder and ice cream won't cheer him up.
mopopping by RhaegalT August 9, 2017

momophone 

When you can't talk to your friends because your mom is in your room taking a phone call.
Sorry guys! I can't talk right now. You know, MOMOPHONE!
momophone by Kidzila June 22, 2018

Momopped 

To Momopp(past tense). Originating from "mom"(someone you trust/that is close to you) and "opp"(your enemy).
Ellis: I heard your dog bit you.

Gavin: Yeah, I totally trusted him!

Ellis: He Momopped you.
Momopped by ItsReborn October 23, 2022
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