flea (redirected from human fleas)

be as fit as a fiddle (British, American & Australian, British & Australian)

to be very healthy. My Dad's nearly eighty now but he's as fit as a fiddle.

See also: fiddle, fit

send someone away with a flea in their ear (British & Australian, informal)

to angrily tell someone to go away. A young kid came asking for money but I sent him away with a flea in his ear.

See also: away, ear, send