(computing) The Free Software Foundation's command interpreter (the "shell") for UNIX-like operating systems.

(computer languages) The scripting language provided with this interpreter.

Shortening of Sebastian.

(informal) A forceful blow or impact.

(informal) A large party; a gala event.

(UK, informal) An attempt at doing something.

(informal) To strike heavily.

(informal) To collide; used with into or together.

(transitive, informal) To criticize harshly.