gutter ball

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A ball played in bowling that goes into the gutter and scores no points.

from the GNU version of the Collaborative International Dictionary of English.

• noun A bowl in which the ball falls into the gutter{4}, resulting in a score of zero for that bowl.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun bowling A ball that rolls into the gutter without striking any pins.