definition #2. When a male inserts his testicles into hopefully a females mouth and she swishes them around, preferrebly with a bubbly sound.

Place your nuts in a bowl of warm water. Then have a girl put a straw into the bowl and blow bubbles under your balls. Rubber ducky is optional of course.

When a male or something with nuts submerges their testicles into a cup of warm water while their partner blows profusely through a straw that has been inserted into the cup creating a jacuzzi affect. For added pleasure the penis is usually wildly jerked with the blowers free hand until ejaculation.

When a man teabags a warm glass of milk while two women blow bubbles into the milk through straws.

When one takes a bowl (ceramic/glass/plastic) fills it with warm water, preferably around 95°. Lower your testicles into the bowl. Then use a straw (preferably a silly straw) and have someone blow at a steady pace forming small bubbles that massage your scrotum/testicles. Just like a jacuzzi, hence the BALLCUZI

When you dip your nuts in a cup of warm water, and somebody else sticks a straw underneath and blows.

(Courtesy of Bixi Zeng)

A man takes a can of sprite (sprite is used because it is the fizziest of soda's) and sticks it into the butthole of a woman. Once the woman's butthole is loose and doesn't close up after removal of the can, open the sprite, and pour it into the woman's butthole. Then, while the sprite fizzes, dip your balls into the fizzy sprite butthole, and complete the ballcuzzi

The act of submerging testicles into a lukewarm cup of water, and blowing bubbles into the cup with a straw