From Longman Dictionary of Contemporary Englishbackspinback‧spin /ˈbækspɪn/ noun [uncountable] DSa turning movement in a ball that has been hit so that the top of the ball turns backwards as the ball travels forwards → topspin
Examples from the Corpus
backspin• Your objectives are lower trajectory, less backspin and, in dry conditions, to run the ball on to the putting surface.• It also keep the club more lofted, therefore producing more backspin for added control. 