Nirvana T Shirt

Def1: Expressing you like a band either by wearing merch or listing them as a favorite band but having little to no knowledge of the band

Def2: to call out someone who is a nirvana t shirt by testing them on their knowledge

Person 1: "Oh, nice Nirvana tshirt, whats your favorite song?"
Person 2: "Smells Like Teen Spirit for sure!"
Person 1: "can you.. name any other songs?"
Person 2: "not off the top of my head"
Person 3: "see? I knew she was just a Nirvana T Shirt a$$ mf"