Can a victim go to police?

N.B. Bullying means making fun of, mocking on a regular basis.

N.B. Suppose, some specific class-mates/colleagues make fun of me in the class, in any public place on a regular basis.

Probably not. And very likely not via the police. If there is a remedy it would be through the educational institution's or workplace's procedures. Barring that, probably via a harassment, but often only for specific reasons (e.g. race, gender, disability).

Can a victim go to police?

N.B. Bullying means making fun of, mocking on a regular basis.

N.B. Suppose, some specific class-mates/colleagues make fun of me in the class, in any public place on a regular basis.

Probably not. And very likely, not via the police or even a temporary restraining order. If there is a remedy it would mostly likely be through the educational institution's or workplace's procedures. Barring that, probably via a lawsuit claiming harassment, but often only for specific reasons (e.g. race, gender, disability).