GIB
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Initialism of guy in back (someone who sits in the back of a jet).
Register: slang
Where it’s used:
Used
American English
Examples
You undoubtedly know that each F-4 Phantom jet carried two pilots in separate, tandem cockpits. Major Dennis Harper was the frontseater and was the AC or Aircraft Commander. Jim was the backseater or the GIB.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “GIB” mean?
Initialism of guy in back (someone who sits in the back of a jet).
Is “GIB” formal or informal?
GIB is generally slang.