as sin

(redirected from something as sin)

as sin

A phrase used as an intensifier for a negative description or situation. I wouldn't buy that painting, it's ugly as sin.
See also: sin

— as sin

having a particular undesirable quality to a high degree. informal
1991 Robert R. McCammon Boy's Life Everybody knew Saxon's Lake was as deep as sin.
See also: sin

as sin

Completely or extremely: He is guilty as sin.
See also: sin