It used to be a reference to someone who could NOT hold on to rebounds or catch passes in basketball. In Chin Na (grappling) the phrase has quite another meaning. One method for improving grip strength is to lift specially shaped very smooth stones. From left to right: the white stone is 10 inches high and weighs 9 pounds; the green stone is 13 inches high and weighs 14 pounds; and the black stone is 14 inches high and weighs 17 pounds.
All are available at Wing Lam’s (WLE.com) – the video VCN06 (or VCN06D for the DVD) is also recommended. A gripping experience.