When you jerk off into a condom filling it with your man chowder, making it similar to a water ballon, except it is sans water.
I made a cum balloon and dropped it off of the roof of my house striking the mailman on his gay ass hat.
by Ali T May 14, 2003
when one fills balloons with the man juice then proceeds to throw them in the air and allow them to break over one's face.
Brian was bored with Jeff's games so he decided to play cum balloons by himself.
by mr. amazing April 27, 2006