sick as a dog

Meaning: If you're as sick as a dog, you're very sick.

For example:

  • I've been as sick as a dog since I ate those sausage rolls.

  • Helen hates to miss work, so she really must be sick as a dog if she isn't here.

Quick Quiz:

Gerry is as sick as a dog, so he should

a. go to see a vet

b. go to a hospital

c. get a new dog

Idiom of the Day

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Contributor: Matt Errey