Another term for A member of the male anatomy, or his penis.
His gens, His shlim shlam, his wiggle tugger, his wenis
Marc: Another penis picture post... never gets old.
Lil: Oh wow that was a penis? I thought it was a sandcastle.
Marc: Omg lmfao
Lil: see? his hand looks like the sand.
When finishing up sex, you kick the shit out of your partner, as you would a sandcastle when you are done building it.
I sandcastled the shit outta that girl last night.