rubber duck

/R AH1 B ER0 D AH0 K/
noun
  1. 1

    A toy, made from rubber or rubber-like plastic, shaped like a duck; usually a floating bathtub toy.

  2. 2

    An inflatable boat.

verb
  1. 1

    To act as a sounding board for a programmer that is debugging their code, facilitating rubber duck debugging.

Source: https://en.wiktionary.org/wiki/rubber%20duck