Pertaining to a person - usu. male, usu. city-dwelling - who has a penchant for wearing flannel shirts, particularly plaid or checked ones, even though he is more likely to spend his days in front of a computer screen than hacking down trees in British Columbia. Said shirt may not be tucked into the trousers for fear of looking uncool.
Optional accessories: Beard, axe, sandals, outdoorsy picture to pose in front of.
Optional personality: Hipster, maniac (axe-wielding)
Not to be confused with: Homosexual (loves sex with homogenised milk), antihomosexual (hates milk-fuckers), metrosexual (sex in the subway), asexual (sex from behind), intersexual (sex with foreigners), intrasexual (prefers people from their own country), parasexual (sex with ghosts), unsexual (headache) and psychosexual (Freud).
See also: Whetstone, Gillette, lubricant, therapy.