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1.
When a woman goes to the beach and gets sand in her vagina.

Can also be used to describe an irritable woman.
"What's wrong with Melissa?"
"Oh, she has a bad case of sandgina."
by Fred Peaches May 14, 2007
 
2.
When a woman goes to the beach and gets sand in her vagina.

Can also be used to describe an irritable woman.
"What's wrong with Melissa?"
"Oh, she has a bad case of sandgina."
by Fred Peaches April 30, 2007
 
3.
when a girl goes to the beach and gets a bunch of sand stuck in her vagina.
Olivia was playing in the ocean when a wave knocked her over and she got a load of sand up her pussy.
by jake March 22, 2005
 
4.
(proun: san-jine-ah) a woman who plays up her sensitive, "vagina" role (slang for the classic feminine, celebrity magazine reading, hot sunglass toting, thong bearing, no adventure seeking woman) and choose to not get off her neatly groomed vag and play with the rest of the boys
The boys were really disappointed when Brittany Badass came to camp and turned out to be a total sandgina surfer.
by mcdiddy August 14, 2008