Gutterballs is the plural of gutterball, a bowling term for a ball that rolls into the gutter—the channels on either side of the lane—and fails to hit any pins.
Figuratively, a gutterball is any badly missed attempt or complete failure: That presentation was a gutterball.
The term sometimes appears as two words: gutter balls.
1. bowling — lane, Designated travel strip; pins (Pointed sewing fasteners); strike (Forceful impact or stoppage); spare (Held in reserve); miss · frame · alley · zero · score · league · amateur · embarrassment · novice · beginner
2. slang — failure, Lack of success; flop (Complete commercial failure); blunder (Foolish, costly mistake); mistake (Wrong action or decision); botch · misfire · dud · whiff · strikeout · bomb · disaster · bungle · fumble · screwup