fit as a flea
fit as a flea
in very good health
The phrase makes reference to a flea's agility.
RELATED IDIOMS :
a flea in your ear
a sharp reproof
Formerly a flea in your ear also meant something that agitates or alarms you as does the French phrase avoir la puce à l'oreille. Nowadays, it is often found in the phrases give someone a flea in the ear or send someone away with a flea in their ear .
fit as a flea :
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