ga-dunk-a-dunk
The thing that makes you want to slap a guy’s back so hard, it knocks his ga-dunk-a-dunk out.
I saw him walking down the street, and I just knew he had a big one.
She said it looked like a meatball on a stick, so juicy and big.
He tried to hide it, but his ga-dunk-a-dunk gave it away.