Trying too hard to look cool/fancy and failing. Looks like you are trying too hard to be cool.
She is so "fanch", she got fake gucci bag and glasses to look popular.
He is posing with an empty vodka bottle for his instagram to look cool, but he just looks fanch ngl.
Fancy ranch; another name for tarter sauce, primarily used in the old French Louisiana portions of the American South.
These fish look great, but can we have some fanch?