pickman

1 : a laborer who uses a pick or pickax.

2 : one in charge of picks (as in a mine)
3: Jewish (Ashkenazic): nickname for a big eater or a glutton, from Yiddish pikn 'to eat' + man 'man'.

person 1: "so what you do for living?"

person 2: "i'm a pickman"

person 1: "what?"

person 2: "i work in mines with a pickax"

person 1: "oh"