A point during masturbation where you start to lose control and revert to a Neanderthal goon tard, often after hitting poppers or smoking an insane amount of weed. The pleasure becomes so intense that your eyes roll back, your mouth opens into an "O", and you're either panting, grunting, making monkeybate sounds or babbling about how good your penis feels.
This term refers to a man "gaining" an inch to his dick by having done something extremely badass/manly, thus becoming even more manly. Men can wear these accomplishments as a medal and brag about them at later dates.
Dude #1: "Man yesterday was crazy! I definitely gained an inch."
Dude #2: "What did you do to earn that accomplishment?"
Dude #1: "I grew a beard, threw on my plaid shirt and bibs, and went out to the forest and chopped down trees to make myself a log cabin."
Dude #2: "Damn!"
Verb; to be gooned is to be awaken by two large men (usually Somoan) and escorted from your home to a wilderness program, RTC, or other therapeutic or recovery establishment.
Frank: "Jim! Have you seen Todd? I haven't seen him in a couple of days."
Jim: "You didn't hear? Todd got gooned the other night! He put up a good fight though. The goons hand to put him in handcuffs and had to give him a horse tranquilizer to comply."