clonk

noun

1. The abrupt sound of two hard objects coming into contact.

   “Our milkman is a jovial character, but not one given to yodelling at the customers on his round. Only the resounding "clonk" of bottles advises us that a couple of pints have been left on the doorstep.”

   “He passed under a low branch now. It hit the top of his helmet with a clonk.”

   “The minute hand moved with a clonk, and shuddered to a halt on the 9.”

2. A stick-like tool used to strike the surface of the water and produce a sound that causes nearby fish to attack the bait.

verb

1. To make such a sound.

   “One half-naked kid with a garrison cap clonked on the marimba; the little black rubber balls on his sticks struck fast.”

2. (informal)To wallop, clobber.