Prom Frate 

A combination of the words 'friend' and 'date' that signifies two friends who go to prom together.

Juliana was Andrew's last-minute prom frate.

Prom Frate by TheFirstFrate April 23, 2022

Prom Fate 

As a form of destiny or fate, a Prom Fate is when you're going to prom with your prom date, then, before the end of the night, he/she either friend-zones or breaks up with you.

I met my Prom Fate last night, man. I miss her so much already.

Prom Fate by Garbonzo the 3rd May 30, 2018