Bandit

"Uh oh, another Bandit droppin' in behind us! They're tryin' to flank us!"

- Manuel Mendoza

Bandit is a latter phrase used by the UNSC Marine Corps to describe and entail a possible enemy aircraft or dropships of an unknown classification in vectored proximity and distance. It has been used to reference Spirit dropships.

The term originated from brevity code used by twentieth Century military forces.

Trivia
Before the actual name of the Spirit dropship was revealed in Halo: Ghosts of Onyx, the name of the craft was assumed by some fans to be the Bandit, due to Marines' use of the term to alert others of one arriving in Halo: Combat Evolved.