poof

interjection
  1. used to represent a sudden disappearance or the sound of a small explosion
  2. Usage: informal; often used in children's language or magic contexts
noun
  1. a sudden disappearance or vanishing
  2. Usage: informal
  3. a small cloud of smoke, dust, or powder
  4. Usage: informal
verb
  1. to disappear suddenly
  2. Usage: informal; often used with 'away' or 'off'

Examples