That thing your mom does when she's driving, you're in the passenger seat, and she comes to a hard stop, so she puts her hand out to stop you from moving forward.
Can also be done outside of a car, if one intends to stop another person from moving forward for whatever reason.
When a Mom constantly reminds her kids to do things they don't want to do. Having to always remind the kids is annoying on both parts but she did it with love. Momminders are given by the best Moms!
The dedictated Mom was constantly giving her kids Momminders to do their homework, clean their rooms, walk the dog, and take out the garbage. The Momminders were annoying to give and receive but were always given with love.
I was packing to leave on a trip when my Mom came in my room with Momminders to pack my passport, take snacks and pack extra underwear. Then she suggested another Momminder when she told me to lock and tag my luggage. Then another Momminder when she suggested I pack purell and extra kleenex. I got it!