guilty as sin
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Unquestionably guilty.
Register: colloquial
Where it’s used:
Used
American English
Examples
Joe Feinberg, who supplied the decorative ceramic tiles for the Key Biscayne homes of both the President and Bebe Rebozo, thinks Nixon is "guilty as sin."
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 “guilty as sin” mean?
Unquestionably guilty.
Is “guilty as sin” formal or informal?
guilty as sin is generally colloquial.