Here are some examples of similes using "as ugly as":
* As ugly as sin: This is a common idiom used to describe something very unattractive.
* As ugly as a troll: This compares something to a mythical creature known for its ugliness.
* As ugly as a wart: This compares something to a small, unsightly growth on the skin.
* As ugly as a broken mirror: This compares something to a shattered mirror, suggesting a lack of beauty and order.
* As ugly as a mugshot: This compares something to a photograph taken of a person arrested for a crime, suggesting a lack of attractiveness and perhaps even an air of danger.
To choose the best simile, consider what aspect of ugliness you want to emphasize and what image you want to evoke.