floor one could eat off

Meanings:

• 1.

  USUKinternationalidiomaticcolloquial
  • A hyperliteral description of a floor so clean that one could, in theory, place food directly on it and eat from it.

• 2.

  USUKinternationalidiomaticcolloquial
  • An emphatically clean or well-maintained floor; by extension, a very clean room or premises.