Entertainment / Golf / Ball Marker: (also 'marker') usually a small, flat object (like a dime) used to mark the ball's position (usually, but not exclusively) on the green while other players putt and/or the ball is cleaned
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Entertainment / Bowling / Lane Markers: Range finders (alley sights) and foot guide lines. MORE
Entertainment / Basketball / Live Ball: As soon as a ball is given to a free-throw shooter or a thrower on a throw-in, it's live. MORE
Entertainment / Baseball / Live Ball Era: This refers to the period of play beginning after the Dead Ball Era ended in 1920. MORE
Entertainment / Football / Live Ball Foul: A foul given for various infractions such as changing numbers during a game MORE
Entertainment / Baseball / Knuckle Ball: A pitch thrown by gripping one of the seams on a ball with fingernails and/or knuckles of the forefinger and middle finger with the thumb another fingers underneath the ball. The ball is pushed out of MORE
Entertainment / Bowling / Kill The Ball: To take the spin off the ball, resulting in a straight shot. Often used to maximimize accuracy on easy spare leaves. MORE