What is the meaning of Freak?

Someone or something that is markedly unusual or unpredictable.

(Should we delete this sense?) A hippie.

(Should we delete this sense?) A drug addict.

A person who is extremely abnormal in appearance, social behavior, sexual orientation, gender identity, and/or business practices; an oddball, a unique person, originally in a displeasing or alienating way.

A person whose physique has grown far beyond the normal limits of muscular development; often a bodybuilder weighing more than 260 pounds (120 kg).

An enthusiast, or person who has an obsession with, or extreme knowledge of, something.

A very sexually perverse individual.

A wild dance.

A sudden change of mind

A streak of colour; variegation.

Euphemistic form of fuck.

To react extremely or irrationally, usually under distress or discomposure.

To be placed or place someone under the influence of a psychedelic drug, to experience reality withdrawal, or hallucinations (nightmarish), to behave irrational or unconventional due to drug use.

To streak; to variegate

Strange, weird, unexpected.

A man, particularly a bold, strong, vigorous man.

A fellow; a petulant young man.

freak (oddball)

freak (dedicated fan)

Source: wiktionary.org