faddow
A person who can't stand still when a new trend comes out. They're always the first to try it, and the first to drop it when it's no longer cool.
I'm a faddower. I bought 10 pairs of socks with glitter on them. Then I realized I looked like a mad scientist.
My friend is a faddower. Last week she was wearing a hat that said 'I love breakfast.' Now she's wearing a hat that says 'I love lunch.'
My sister is a faddower. She tried a diet that only included tacos and chicken nuggets. It didn't work, but she still loves it.