cold as a well-digger's arse

Adjective

UK colloquial humorous not-comparable vulgar

(simile, UK, colloquial, vulgar, humorous) Very cold.

Japanese Meaning

非常に寒い / 極度に冷たい / ものすごく寒い

When we stepped outside at dawn, the air was cold as a well-digger's arse.

夜明けに外に出ると、空気は井戸掘りの尻のように凍えるほど冷たかった。

Sense（1）

(simile, UK, colloquial, vulgar, humorous) Very cold.