Definitions by RockmanAU
poser
A Poser is a total showoff! The difference between a person with talent and a poser is that the poser is just trying hard to appear talented for personal status gain and to further boost his/her ego (which is already so overinflated that they unknowingly make fools of themselves with their over exaggerated shows) whereas the person with talent is just doing their stuff... performing (in the purest sense of the word). And would perform well with or without a crowd but the poser only performs when there is a crowd. So I totally agree with most definitions here up to a point... that being that, 1. yes, posers are trying to show off but 2. no, they are not trying to imitate some culture punk goth or otherwise but instead would just do anything to attract attention to the point of making a total fool out of themselves, unlike someone who just dresses punk, goth, rad or whatever (even if they aren't) but just felt like dressing that way to express themselves a little differently.
Since UV 1 is just a brand name, while it may be popular in certain locations, I don't think it's the definitive definition. Never heard UV 2 used before either (maybe a locality thing too but not as likely as UV 1) so I am going with the standard... UV = Ultra Violet as in light wave. Especially referring to lights.