so clean you could eat off the floor

so clean (that) (one) could eat off the floor(s)

Of a room, house, restaurant, etc., so clean and hygienic that one could hypothetically eat directly off the floor without getting sick. I want this place to be so clean you could eat off the floor! The health inspector was impressed. He said the whole kitchen was so clean that you could eat off the floors.
See also: clean, could, eat, off
Farlex Dictionary of Idioms.

so clean you could eat off the floor

[of a room or a house] very clean. Her kitchen is so clean you could eat off the floor! It's so clean here you could eat off the floor. I prefer a little mess, myself.
See also: clean, could, eat, floor, off
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • so clean (that) (one) could eat off the floor(s)
  • in theory
  • look at (one) cross-eyed
  • look at cross-eyed
  • within arm's reach
  • get a thick ear
  • give somebody/get a thick ear
  • (Someone or something) called, they want their (something) back!
  • one rotten apple spoils the (whole) barrel
  • one rotten apple spoils the (whole) bushel
References in periodicals archive
Taunton-based Kopin makes the high-tech screens in rooms so clean you could eat off the floor. But why would you want to when you can buy an Olympus digital camera with a Kopin viewfinder?
The Backup files; A look back at the week in business