Squap is the noise that the net makes when a basketball shot is perfect. It is a more specific type of swish. A squap is when the net moves backward in response to the ball going through the net. This is a slang or colloquial way of defining a sound and event that occurs semi-frequently in basketball. Squap can be used as a verb or a noun or an adjective. To squap is to shoot a perfect shot.
Ray Allen released the shot in game six. This was one of the most defining moments of NBA basketball. The shot travelled through the air as the crowd anticipated a miss. But he "SQUAPED"
Stephen Curry squaps on a daily basis.