bulker

/B AH1 L K ER0/
noun
  1. 1

    A bulk dry goods cargo ship.

  2. 2

    A person employed to ascertain the bulk or size of goods, in order to fix the amount of freight or dues payable on them.

  3. 3

    A person who bulks (gains body mass).

  4. 4

    Anything, such as a dietary supplement or an exercise, that helps a person to gain body mass.

Source: https://en.wiktionary.org/wiki/bulker