master key
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
A shotgun shell designed for breaching doors.
Register: slang
Where it’s used:
Used
American English
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “master key” mean?
A shotgun shell designed for breaching doors.
Is “master key” formal or informal?
master key is generally slang.