Dictionary.com
Thesaurus.com
Synonyms

sick as a dog

Idioms  
  1. Very ill, especially from a stomach malady. For example, I don't know what was in that stew but I was sick as a dog all night. This simile was first recorded in 1705. Why a dog should be viewed as particularly sick remains unclear.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Scott: Keith woke up the day that people are coming in, Sunday morning, and he is sick as a dog.

From The Wall Street Journal • Apr. 6, 2026

“You have your child who is sick as a dog, you have no hope, you find CBD hemp, non-impairing, non-intoxicating,” Goldstein said.

From Los Angeles Times • Jun. 16, 2024

One woman wrote: “My husband tried this supplement for anxiety and better sleep and was sick as a dog for 24 hours after taking one capsule. He had horrible cramps and diarrhea.”

From Seattle Times • Mar. 30, 2022

He also would be as sick as a dog the next day.

From Slate • Jul. 1, 2013

I’m sick as a dog, or a mangy hog, Of this ’tarnal nasty fightin’, That’s all gone wrong, and lasts too long For a man that’s thinkin’ o’ kitin’.

From Southern War Songs Camp-Fire, Patriotic and Sentimental by Various

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "sick as a dog" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com