sprinkle monkey

A derisive name given to the new guy at the ice cream shop that isn't yet allowed to operate the cash register or even scoop ice cream. He/she is only allowed to add toppings such as sprinkles to a cone that a senior employee has already scooped.

Fatty: Hey dude can i get some sprinkles on that peanut butter chocolate fudge lard two scooper?
Dude behind the counter: HEY SPRINKLE MONKEY, this fatty wants some sprinkles on his next heart attack.