Poser

Someone who pretend to be or to know something, (especially in music or sports), just to seem cool or to feel appreciated.

P: hey look at my new shirt! I looove Nirvana!
L: nice, i love em too! What’s your favorite song?
P: oh it’s smells like teen spirit, it’s so heavy!
L: ehh, do you know another songs?
P: hmmm, idk, I just love smells like teen spirit.
L: oh, so you’re a poser..