freak

noun
UK /friːk/
US /friːk/

A person or thing that looks or acts very strange.

The funny mask made him look like a little freak.


OTHER MEANINGS

2. A very unusual event that happens by chance.

The snowstorm in summer was a freak of nature.

3. To become very upset, excited, or angry.

My dog freaks out when he hears thunder.

4. A person who is extremely interested in something.

He's a fitness freak who runs every morning.