The amount of spinner rotations on a well-placed shot. A shot has more or less spinnage based on how much or how little the spinner spins after the player makes a clean shot through it.
New Pinball Dictionary: Spinnage
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New Pinball Dictionary: Pete Townshend
When a player shoots a spinner so well and so cleanly that they exaggerate their excellent shot by playing air guitar on the game. More spins of the spinner mean more air strumming by the player.