A "net violation" unless touched by hair like in a pony tail. The only permissible touching of net during play is when a moving ball causes the net to contact a defender.
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I don;t think there's a name for it but if that happens you should out one of your shoulders against the net and bump it over or to one of your teammates.
Hope this helps!
It's when the blocker goes up on a hit but the ball only "touches" their hand, and keeps going. Or when anyone goes to play the ball and relizes it's out but they "touch" it when it goes out.