We found 2 dictionaries that define the word as sick as a dog:

General (1 matching dictionary)

1. as sick as a dog: Merriam-Webster

Miscellaneous (1 matching dictionary)

2. as sick as a dog: Idioms

▸ Words similar to as sick as a dog ▸ Usage examples for as sick as a dog ▸ Idioms related to as sick as a dog ▸ Wikipedia articles (New!) ▸ Words that often appear near as sick as a dog ▸ Rhymes of as sick as a dog ▸ Invented words related to as sick as a dog