An antonym would be: Hippie.
Unfashionable you just add a prefix un, meaning not
The opposite of fashionable is unfashionable.Other words that mean the opposite of fashionable or trendy:out of date, outmoded, out of style, passé, old-fashioned, dowdyplain, boring, dull, nondescriptunattractiveuncooltacky
I am fashionable.
That is a very fashionable hat!
Jessica Simpson's shoes are quite fashionable.
ugly
yes
"In".
The root word for "fashionable" is "fashion."
Trendy
The dictionary definition of a "geek" is an unfashionable or socially inept person. So that opposite of a "geek" must be a fashionable or socially confident person.
· faithful · fashionable · fascinating · fashionable · faultless · fearless · flaky · flawless · fun