shebang

n. [ Cf. Shebeen. ] 1. A jocosely depreciative name for a dwelling or shop; a primitive dwelling; a shanty. [ Slang, U.S. ] [ 1913 Webster ]

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. [ informal ] [ PJC ]

3. (computers) [ Possibly derived from shell bang; the character ! is referred to in some computer contexts as bang. ] The character sequence #!, which frequently begins shell scripts in a Unix system. [ PJC ]