1 definition by SmashBox

Top Definition
The act of the male human species lowering his scrotum into a beverage usually belonging to the opposite sex whilst the drinker of the beverage is blowing bubbles with an implement such as a straw.
Darling that chocolate milk shake looks so nice. Would you mind giving me a Nut Spa with it?
#nut spa #ball spa #ball bath #dunk #testing the water
by SmashBox July 15, 2008
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