Basically a wannabe rocker style of life, WITHOUT: the sex, drugs, rock n roll or any good style of rock whatsoever.
60's and 70's: sex, drugs, rock n roll, amazing bands, guitar solos, amazing guitarists.
90's and 2000's: "underground concerts" "hardcore" no sex, no drugs, no guitar solos, shitty bands, faggish haircuts, shitty trends, "goth" "emo" "sxe" and other stupid shit and poser style music genres.
I think most of the good rock, heavy metal and great guitarists died out in the 80's before the start of the 90's.
Also see the word poser for more information.
here's a new sub-genre for you, poser-metal, poser-rock