Mid

Something that is ok or fine, It isn't good or bad its just alright, it can be used to insult something but it can be sometimes misinterpreted in a different way.

This burger is pretty mid
Or of they are using it in a bad way:
This burger is just so mid!

Fodder

A character who lost all it's charm and is now food for stronger fictional characters, it mostly happens when a character becomes overrated which is why some fodder characters can be called overrated fodder.

This character is so fodder