When somebody slides their asshole over the tub faucet and cranks the hot water up to max wow letting their large intestine blood with boiling water. When they cannot hold anymore they then release the water onto their partner. It is usually accompanied by shit particles and screams.
I dropped a water balloon on Shelly last night. It ruined the bed.
When a man has to urinate, but does not have the opportunity to do so, one solution is to cover the tip of his penis with gum so urine does not squirt out. When you continue to hold it eventually you will come to a point where you can no longer hold it. At this point, the gum fills with urine and becomes a water balloon. Usually used in context with holding off going to the bathroom for a long period of time.
"Matt was in the office meeting so long he water ballooned" OR "OMG George, where's the nearest restroom, I'm water ballooning over here!"
Where a couple of any sexualities' get a piece of gum, and both ejaculate in it to where it forms a pouch of the couples seamen. After this the couple play a game of rock paper scissors and who ever loses in the game has to chew the gum for the rest of the day with no complaints.
Ex: (Jimmy) Man I've been having this salty taste in my mouth after losing to a game of "WaterBalloon" with Jessica
Tying up the opening of your foreskin and then masturbating while keeping it tied over a long period of time until it's full of semen and then giving a girl the biggest facial she's ever received.
Friend: "How'd it go with you and Michelle last night?"
You: "Went great, I've been saving a waterballoon all month for her."
A term to describe cumming into an uninflated balloon, turning it into a semen-balloon and throw it at kids at a birthday party and watch to see the kids' reaction when they realize what's on them