What is the meaning of Punch_out?

To repeatedly hit a person.

To hit a person so that they become unconscious (knocked out).

To use a punch to remove a piece of material or to remove a piece already scored.

To leave a workplace by punching a timecard.

To leave a workplace.

To eject from an airplane.

To extract data from a computer by the use of a keyboard.

To rule (by an umpire) that a pitch is a called third strike, often done emphatically.

To throw a called third strike; to strike (someone) out.

Nonstandard spelling of punchout.

Source: wiktionary.org