ugly as sin
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Extremely ugly.
Register: derogatory
Where it’s used:
Used
American English
Examples
It was easy enough to see that the child was a changeling, for it wasn't like other children at all it screamed and cried, as if a knife stuck in it, and it wheezed and hit about with its arms like a huldre-cat, and was as ugly 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 “ugly as sin” mean?
Extremely ugly.
Is “ugly as sin” formal or informal?
ugly as sin is generally derogatory.