An extremely popular suicidal activity, usually initated by a chant of "Too BING! Too BING!".
The basic idea was to try to stay on an inner tube towed by a boat driven by this maniac ...
You'd start out slow ....
maybe even begging for mercy ....
but then the pace would pick up, and before you could say "Weeny Arm!" ....
you were gone in a SPLASH!