The pearlescent frothy precum usually found at the tip of a teenager's cock when he furiously masterbates while watching porn downloaded from the internet.
Tom: Hey Dick! How come your spunkbubbles are bigger than mine?
Dick: Practise dear Tom. Practise makes perfect spunkbubbles.
Totally controlled by his genetic make-up and the unfortunate fact that he was raised by lizards, Larry started complaining about everything in the hope that everyone would become as miserable as him.