Combination of gamer and lamer. This is a derogatory term used by demosceners to denote people who visit demoparties just to play games or to download warez, porn, mp3s or divx's. This annoy the real sceners, for reasons listed under demoparty.
Some sceners are more favorable to glamers at parties,
hoping that some might take an interest in demos and become new sceners. Also, glamers pay for the entrance without competing at compos, so they raise the prize money.