The overweight guy at work that tries to look for a new look and suddenly shows up to work one day with a shaved head. His extra weight and double chin helps to round out his entire head making it seem 'bowlingballish' in shape.
Wow, did you see Seantoday? He shaved his head! It makes him look rather distinguished and bowlingballish!
When you decapitate someone's head from their body. And you stick 2 fingers into their eye sockets and 1 finger into their mouth. You then proceed to roll their cut off head into 10 pins, like a traditional bowling game.
Killer "Who wants to playbowling?"
Bowler "Let's play! I'm an expert bowler!"
Killer "You pick your ball first."
Bowler *picks a red bowling ball* "I choose this one!"
Killer "I CHOOSE YOU!"
*CHOPS OFF HEAD*
Killer "This is another great Head Bowlingball. After this game, I'll add it to my collection."