When you sutff a garbage can until you can absolutely fit no more in it, and when you go to throw it in a dumpster upside down, the bag stays on the can, but the garbage itself goes into the dumpster, but comes out like sand from a bucket at the beach.
I took the trash out to the dumpster and made a Compton Sandcastle.
by notfunnyhahafunnyqueer February 1, 2011
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When someone takes a shit on a vagina then pushes it inside with their fingers.
I'm tired today because I was up late making sandcastles.
by Jasehole and William Cocksmith November 2, 2011
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Verb - While having sex on a beach, before climax, pulling out and Ejaculating(cumming,coming) on the sand. Afterwards, you build a small castle using the sand and ejaculate.

Noun - the once sticky, now dried residue of beach sex used for the construction of sand sculptures.
Verb
'Dave, how come your sandcastle is so sturdy?'
'Well, Bob, funny you should mention come. The secret is Sandcastle Ejaculation .'

Noun
'Damn Jeff, that is one big fucking sandcastle'
'Yeah, my balls ache...I sure needed a lot of Sandcastle Ejaculate to make that tower.'
by chris kringle October 4, 2006
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A list of things a young couple want to achieve before having children cramps their style.
"Dude, those photos of your surf trip to Hawaii look great!"
"Yeah, Sarah and I have crossed that one off our Sandcastle Bucket List. We have a few things we want to do before the ankle biters come along."
by Kentoonist September 20, 2012
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San Diego Sandcastle, noun; When a couple goes down to the beach, makes love, and the man finishes by spraying his natural sand-glue on the lady's naked boobs. The couple then finishes by building two sandcastles, one per boob, with the boobs and sand-glue as a foundation.
Dude, last night that hooker slut Tori and I went down to the beach and I totally gave her a San Diego Sandcastle.
by NotYourAverageLunch January 16, 2013
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While having sex with a woman and she upsets you while using a condom pull out and insert your member in a cup of salt and reinsert back into the woman forcefully.
Me and Jess were booking up and she pissed me off so I gave her a Salvadoran sandcastle... Haven’t talked to her since.
by 1LoKota October 25, 2020
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A sad love ballad (follow up to let’s go to the mall) in which a robot makes an appearance and Robin makes out with Simon on a bench
Barney begs to watch sandcastles in the sand after he finds out it exists
by Thomas Jeffershit November 23, 2021
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