Bowler's Aversion is a term used to describe the feeling of disappointment or frustration experienced by a bowler when they roll a GUTTER ball. GUTTER, in this context, is a six-letter word that refers to the channel along the edge of a bowling lane which a ball must not enter in order to score points. When a bowler rolls a GUTTER ball, they are unable to score any points and thus experience Bowler's Aversion.