Best definition
wanna be fan
Someone who is ignorant and tries to act like they know everything about a fandom, show, or anything popular when

in reality they know nothing.They can be annoying, so be sure to ignore everything they say about the thing you love.

Ex. I LOVE PONIES, DERPY IS THE ONLY SIDE CHARACTER I KNUW OF SO IMMA TALK AOBUT IT ALL THE TIME!!!,11!!!1

See? This is what wanna be fans usually say. The fake fans of the world.