When a guy dips his member in the sand and sticks it up anothers butthole.
Dude I woke up at the beach with sand in my butthole; I am pretty sure that dude I hooked up with last night sandcastled me.
by Dirty Sanchex 44 May 26, 2010
When a Runescape warlord takes lead and completely destroys your carefully sculpted pile, reducing it to 30 options spread across the face of the wilderness within a few minutes. Much like a fat ginger kid would step on your sandcastle when it is almost complete.
Tiffany just sandcastled us again...
by arma150 October 17, 2010