Some one who is asexual, not in their gender but their sexual orientation. A person who is not attracted to guys, girls, or anything thereof... Bears usually do not register attractivness, hottness, like talking about sexual topics, think the "hot" guy in school is "hot," or have a desire for any sort of sexual activity. Bears are not very common, in fact less than 1% percent of the US population are true bears. Being a bear is in no way a negative; nor does the term bear have any negative conotation.
A Bear is a large, burly homosexual man who likes to punish and sodomize smaller men called "man slaves" or just "slaves" for short. Bears typically are into motorcycles(Biker Bears) Tools and fixing things, Hunting and fishing, sports and anything else rugged and manly really. Bears can't really be called gay, they are just so manly that they don't like women. Bears tend to almost ALWAYS have shaved heads and big beards, they tend to dress in leather jackets, flanel shirts, jeans and anyother manly attire. Bears typically listen to hard rock and old school Metal like Motorhead, Judas Priest, Manowar and Slayer ect. A good example of what a typical bear looks like would be Kerry King of slayer.
"Hey man, lets go to home-depo and go Bear spotting!"