What is the meaning of Goofy?

Quirky or silly, often in a humorous manner; daft.

Synonym of goof (“a foolish and/or silly person”).

A button (“clothing fastener”) in the shape of a person, object, etc., often collected as a hobby.

Of a person: having crooked, especially protruding, front teeth; buck-toothed.

Riding on a skateboard, snowboard, or surfboard with one's right foot forward.

Of riding on a skateboard, snowboard, or surfboard: with one's right foot forward.

A skateboarder, snowboarder, or surfer who rides their board with the right foot forward; a goofy-foot.

Source: wiktionary.org