When your cat plays in his litter box long after he's done with his business.
What is taking Muffin so long?

She's sandboxing, dear.
by mcjam69 November 24, 2015
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Often a result from a long day at the beach, a sandbox results from an excessive amount of sand in the box. Other causes may be from mud restling or as a result of a hot new trend. In Europe, women often throw sand in their box in the case of a hot sexual encounter. One can often tell when a girl has a sandbox because when she walks it makes a crunching/grinding sound.
Germaine: "Last night ah tried to hit up that box, cept that it turned out to be a sandbox!"
Dellareese: "Awww shit nigga!"
Germaine: "Ahh don't want no sand in m'a tacos!"
by CockBlocker February 2, 2006
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An imaginary dumping ground for past toxic relationships/friendships/experiences in ones life.
Hi John, are you going to Vinny's wedding?
Vinny from High School, the one who embarrassed me in front of the entire seventh grade when he convinced my ex girlfriend I was half monkey? No Way, he's in the sandbox!Once they're in the sandbox there is no getting out.
by DrDre89 January 26, 2020
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n. or adj.

childish behavior of an older person, aka someone acting like a five year old cunt when they are actually not
She was being a huge sandbox when she dropped her ice cream and threw a fit.
by anamses February 23, 2008
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what we should trun into a sheet of glass...
by Bill May 20, 2004
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when you fuck some girl than throw sand in her cunt
i gave that girl a sandbox and she was very angry
by Adam October 13, 2004
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