Meaning of “freak” - Learner’s Dictionary

freak

noun [ C ] uk us /friːk/
INTEREST informal

someone who is very interested in a particular subject or activity:

My brother's a bit of a computer freak.
STRANGE

someone who looks strange or behaves in a strange way:

They made me feel like a freak.

(Definition of “freak noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)