Boop

The art of deftly bouncing a standard tennis ball off of the head of your nemesis. Considered one of the most humiliating acts ever inflicted upon man.

One must bounce a tennis ball of another individuals head, whilst exclaiming 'boop', in a diction of choice, and proceed to catch the ball

The best 'boops' occur when it interrupts one speaking

Use with caution

'Did you see Mandark boop Dave?'
'Yeah, he booped him so good Dave became a hermit'