The mix of an absolute greb that looks so hideous it may aswell also be a gremlin which creates the mix of a greb and a gremlin therefore it’s called greblin.
A greblin is someone who has a greb style and also is very ugly, this makes them look like a gremlin. the word greblin associated from the two words mixing together which formed greblin a new term to tell someone they are unfashionable and have a hideous appearance.
Someone who gives zero fucks about anything. They do whatever they want, whenever they want, wherever they want!
Conner: "Yo Ethan! Did you do the assignment for Grad School?"
Ethan: "Nah Bro, I am a Super Gremlin, I skipped class and smoked a backwood the size of King Kong's finger with the Professors wife."