(correct definition) When a girl fills her mouth completely with water and proceeds to suck your dick. You then blow your load in her mouth and give her cheeks a big ole smack and pop that mofuckin water balloon. Hilarity ensues.
I water ballooned my girlfriend because she lost a bet and now she isn't speaking to me but I don't give a shit because I water ballooned her.
The sexual act of a male inserting his penis into the anal cavity of another individual and when penis has fully penetrated the recieving anal cavity, the male begins to urinate and continues until relieved.
After an entertaining movie and pleasant dinner, Jim asks Kendra if she is interested in coming back to his apartment. Kendra hesitates at first but then Jim quietly whispers, "I'll give you the meanest, hottest, and longest Water Balloon you've ever had." Kendra quickly agreed.
when an uncircumsized male pulls the foreskin of his dick over his knob and starts to pee. the foreskin then inflates to a decent size (about a handful)thus resembling a waterballoon. although rare, this is single handedly the most disgusting and humerous thing ever created
"gebraldo decided to scare his girlfriend into thinking he had a terminal tumor located on the knob of his cock. So he whipped it out and waterballooned that shit"