A whacking.

Nugget:  Where's the ball?
M:  It's by the fence.  Daddy whacked it really far this time.
N:  What's a whacking?

N:  Look at that truck!  It has fancy wheels.
M:  Do you like fancy wheels?
N:  I surely do.

N:  Miss S?
Miss S:  Yes?
N:  Um, this last day I drank a lot a lot of water so I was hydrated.

One frustrating/fun thing the Nugget does now is ask for definitions of words he already knows, so he can be an expert.  For example, he will ask, "What's a car?" and won't accept - "That's a car."  He wants to hear all about it.  A Nugget-approved answer will sound something like this, "A car is a vehicle that carries people.  It has 4 wheels, seats, a steering wheel, a speedometer, head lights, and windshield wipers."  That's all well and good, and he's sucking up information like a sponge.  But just try not running out of breath/patience/sanity when his 3rd question in 5 minutes is, "What is wait?" or my favorite so far, "What is blue?"