Originally a volleyball term, referring to to a play wherein the ball is set up as for a spike, but the forward slows her hand at the last moment and lightly taps the ball over the net.
Because of its funny sound, similar to several vulgar terms, and perhaps by association with rinky-dink
"dink" has come to be used as a generic vulgar catch-all, somewhat like smurf
Dink was also an influential hard rock/industrial band from Kent, Ohio from 1992 to 1998
She stuck her fist in and dinked the ball over the net, scoring the final point!