When somebody has sand in between there ass cheeks or up there asshole making them grumpy and angry.
Jessica: YOUR A TOTAL MCDOUCHE N HUMP!!!
Jon: Smells like the beach!
Matt: She has sandy cheeks!!
Jessica: FUCK YOU MATT!
Stephan: Want me to suck the sand out?
Luke: Ill get the vacuum!
noun: anal sex.
Originated from the term spongebob.
I would do sandy cheeks with her!