Definitions of flake:

• noun:   a crystal of snow
• noun:   a small fragment of something broken off from the whole
• noun:   a person with an unusual or odd personality
• verb:   cover with flakes or as if with flakes
• verb:   form into flakes

  Example: "The substances started to flake"

• verb:   come off in flakes or thin small pieces
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #8575)