punch out Definition

punch²
noun punches

1. A tool for cutting or piercing holes or notches, or stamping designs, in leather, paper, metal, etc.
2. A tool for driving nail-heads well down into a surface.

verb punched, punching

1. To pierce, notch or stamp something with a punch.
2. computing., old use
To use a key punch to record (data) on (a card or tape).

Etymology: 15c: shortened from puncheon a piercing tool.

Phrasal Verb: punch in or out

To clock in or out.