One who posts BS on message boards in an attempt to gain popularity. Tallguys often tease manlets and others who aren't as strong or as tall as them. They often consider themselves God's gift to the world.
noob: O hai guise, im new hear and can pnly bench 100 lbs. is that gud?
tallguy: HAHAHAHAHA i can bench 285 lolz u phail manlet