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 water balloon all month for her."
A Czech waterballoon is when someone puts MDMA or MDA in the tip of a condom that has had a hole poked in the tip & then place's the condom on an errect penis before initiating sex, the fluids from intercourse then mix with the mdma and slowly squirt out with the bonus being when the man ejaculates it mixes and then absorbs and squirts out into the partner getting both parties high.
Bro I gave that chick a Czech water balloon last night and had her squirming.
The act of filling a water balloon with piss and jizz instead of water, and launching it at your homies during a water balloon fight
We were having fun until Jake splashed me with a Golden Water Balloon
It was a wild night. I gave her a Philadelphia water balloon... Now I need a new mattress.
The act of urinating into a woman’s vagina during intercourse.
“ I am going to give you a Portuguese water balloon, if you complain one more time!”