1. A person who is considered strange to other people. This person may do strange things, so this person can be considered a "weirdo".
2. A non-comformist who does not follow trends or a subculture. A true 'weirdo' will juat do what they feel, and can get along with most people. This person does not actually conform to a stereotype and shouldn't be labled.

Weird Person. Usually nonconformist.

the true definition of cool, unlike the hollywood lame version. weirdos are the real deal folks.
the weirder the better! weirdos rock.

a person who is weird.

odd person

you, yourself, and your entire being.

A person considered socially unacceptable or at the least tolerable within certain perameters and under strictly defined conditions, whose behaviour puts him at odds with the greater dramatis personae of human life. Often given to inapproriate remarks and outbursts the like of which may provoke verbal antagonism and, in extreme cases, physical violence against the sayer thereof. Various types of sex pest and stalkers fit the description. As do recluses, political fanatics, angry loners and comic book collectors.