ugly as sin

Idioms  

1. Physically or morally hideous, as in I can't think why she likes that dog; it's ugly as sin. This simile, first recorded in 1801, replaced the earlier ugly as the devil.

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Example Sentences

It’s a stylistic choice to give the film the essence of a faded vintage photograph, but it’s also ugly as sin.

From Los Angeles Times

The Kansas Reflector’s opinion editor deemed it “ugly as sin” in a column under a headline calling it “slapdash and dull.”

From Seattle Times

New Yorker: “During the Second World War, Lee, a student at Huntingdon College, in Montgomery, shunned the standard cardigan-and-pearls attire of the all-female institution in favor of a bomber jacket she’d been given by her brother, an Army Air Corps cadet. Her language was ‘salty,’ and she sometimes smoked a pipe, and, while her face seems to have been pleasantly approachable, she described herself as ‘ugly as sin.’

From Fox News

She said she met Vincent Van Gogh when he would buy paint from her uncle in Arles in 1888, calling him "ugly as sin" and "an awful character".

From BBC

His cousin Denis said to him brutally he was “ugly as sin, but you have a mind”.

From The Guardian