A poser is someone who tries hard to fit into a group which they do not belong to. This is usually to receive a certain type of reputation among others.People also preach they like certain types of music to fit into certain groups yet have no idea what the bands music is about.
Girl:(singing teenagers by My Chemical Romance)I just love My Chemical Romance!
MCR Fan: Who is your favrioute mem of MCR
MCR Fan: My Chemical Romance??You where just singing there songs?
Girl: Oh Teenagers
MCR fan: I love I never told you what i do for a living!
Girl: Whos that song by?
MCR fan:(falls over poser!!!)