VERB. To poserize is to make oneself a total and complete poser in active, organized, and especially PUBLIC fashion. It's a verb so it's a word denoting concerted action of MAKING oneself a complete poser rather than merely being denoted a poser by others. To poserize oneself, one must go to considerable public effort. One cannot poserize another person, only oneself. To poserize could be termed the act of not merely appearing as a poser, but making oneself a poser in public, to the extent that it is self evident and there is no longer a need to call that person a poser, but instead to point out that they poserized themselves.

A person who poses to be a poser just to get attention. Usually has no social group and little to no friends.

To pose: To pretend, to be somebody you're not, to be part of a culture or genre just to fit in.

A poser is someone who tries to fit into a profile they aren't. People who try to give off the impression that they are one thing when they are really another.
Also, a poser can be one who says they can do something that they can't.
Or more commonly, a poser is someone who, when doing something successfully, takes more than enough credit for it.

Kids that bring their skateboards to school.

1.one who pretends to be someone whose not.
2. who tries to fit in but with exaggeration

A person who attempts to blend into a specific social group.