builder's bum
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
The top of the buttocks exposed when trousers are worn too low, or when the wearer bends over.
Register: slang
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “builder's bum” mean?
The top of the buttocks exposed when trousers are worn too low, or when the wearer bends over.
Is “builder's bum” formal or informal?
builder's bum is generally slang.