Why do golfers yell mashed potatoes?

Why do golfers yell mashed potatoes? Mashed potato came from one golfer wanting his mum to spot him on TV. Andrew Widmar first shouted it at the 2011 Chevron World Challenge after Tiger hit a stinger.

Mashed potato came from one golfer wanting his mum to spot him on TV. Andrew Widmar first shouted it at the 2011 Chevron World Challenge after Tiger hit a stinger.