We found 2 dictionaries that define the word fit as a butcher's dog:

General (1 matching dictionary)

1. fit as a butcher's dog: Wiktionary

Slang (1 matching dictionary)

2. fit as a butcher's dog: English slang and colloquialisms used in the United Kingdom

Definitions from Wiktionary (fit as a butcher's dog) ▸ adjective:  (chiefly British) Very fit; in good shape. ▸ Words similar to fit as a butcher's dog ▸ Usage examples for fit as a butcher's dog ▸ Idioms related to fit as a butcher's dog ▸ Wikipedia articles (New!) ▸ Popular nouns described by fit as a butcher's dog ▸ Words that often appear near fit as a butcher's dog ▸ Rhymes of fit as a butcher's dog ▸ Invented words related to fit as a butcher's dog