Megadere 

A fancy word for a fanboy/fangirl

Person 1:Why is this character acting so weird around his crush?

Person 2:Oh, he's a megadere. He just fanboys without any sense of regret

Megadere by Aiko_Oba July 30, 2023

Megadren 

A more abrasive method of referring to someone (or something) that frequently exhibits characteristics commonly seen as extremely drenny, also referred to as "extremely nerdy" or any adjectives of a similar nature. Dern is commonly used as an even more abrasive variation.

"Did you see what I drew during last period?"
"Wow, what a megadren."

Megadren by Franny D March 4, 2009

meguderet 

not able to; limited; not free; forced to;

I just ate meat. Can not drink milk now.
I am meguderet.

meguderet by ZervY March 15, 2005