One who, or that which, hacks. Specifically: A cutting instrument for making notches; esp., one used for notching pine trees in collecting turpentine; a hack.
- Informal One who is proficient at using or programming a computer; a computer buff.
- Informal One who uses programming skills to gain illegal access to a computer network or file.
- Informal One who enthusiastically pursues a game or sport: a weekend tennis hacker.
- See hackie.