weirdo

Meanings

1. A strange, odd, eccentric person.
2. An insane, possibly dangerous person.

1. Weird.

1. A superfan of American science-fiction author Andy Weir.

Etymology

From weird + -o (“person with characteristic”). The earliest documented usages date to the early 1950s in the United States. The similar Scottish word "weirdie" (also referring to an odd, unconventional person) is attested from earlier, in 1887.