paradiddle

A percussive exercise (one of 26 drum rudiments per the National Association of Rudimental Drummers or one of 40 per the Percussive Arts Society) which involves playing four even strokes in the order ‘right left right right’ or ‘left right

I mean, as a drummer, you're sitting at a practice pad for hours on end, doing paradiddles and all the exercises you learn for your craft.

To produce percussive sounds of this kind.