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1.
Someone who is so intrested in you that if there was a peice of glass between the two of you, the other person would practically be licking the glass.
You can back up now and quit being a glass-licker
by Kimmie Lange November 03, 2007
 
2.
someone who spies on others. Quite literally "licks the glass" while being obnoxiously stalker-ish. aka: a stalkerazzi.
Gawd, don't be such a glass licker you pervert!

by ucantlovemeucanthateme July 22, 2008
 
3.
a stupid person
Why do they tint the windows on the short bus? So you don't have to watch the kids licking the glass.
by Anonymous November 05, 2003