Definition of as —— as sin in English:

(as) —— as sin

informal Having a particular undesirable quality to a high degree: as ugly as sin miserable as sin
More example sentences
  • As Marshall commonsensically observes, this whole trial balloon is beside the point, since everything points to the perp or perps being ‘guilty as sin.’
  • They look miserable as sin, but they are all wearing raincoats, and seem to be rather warmer than you.
  • And if you are ugly as sin and suddenly find yourself being chatted up by a pretty female or a handsome male, who wants specific information from you, consider seriously why you are suddenly the centre of attention.
See parent entry: sin

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