potman

(British) A boy or man employed in a public house to collect empty pots or glasses.

A boy employed as waiter to serve (pots of) drinks, as in a tavern.

A boy employed in a plant nursery to tap clay pots with a stick for their ringing sound, indicating whether the plant required watering.

(Ireland, informal) A man who habitually drinks pints of beer, or is revered for his way of drinking them.

(chiefly, British) To potter, to be gently active doing various things in an almost aimless manner.