We found 3 dictionaries that define the word sick dog:

General (2 matching dictionaries)

1. sick-dog, sick-dog: Collins English Dictionary
2. sick-dog: TheFreeDictionary.com

Slang (1 matching dictionary)

3. Sick Dog: Urban Dictionary

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