Shebang

1. A jocosely depreciative name for a dwelling or shop; a primitive dwelling; a shanty.
2. The structure of an object, process, organization, or anything viewed as complicated; -- used primarily in the phrase the whole shebang; as, it comes with unnecessary frills, but you have to buy the whole shebang.
3. (computers) The character sequence #!, which frequently begins shell scripts in a Unix system.