Someone you're going to molest if your submarine is ever on its way to crush depth. If the submarine ever sinks unrecoverable, then the crush depth buddy will be the person you find so you can sexually assault them before you die in a pressure wave incited by the implosion of the submarine. It usually is the youngest looking, cutest sailor with the nicest butt.
"Captain, we're going down!!!" "Okay boys, you know what that means...find your crush depth buddy. Now who's at the top of my list..."
Generally a fraternity or sorority social event when oneGreek invites a "crush" to the party. The person invited usually has no idea who sent the invite but will find out at the party. GDIs sometimes get lucky and show up.
frat guy #1 - dude, i just go an invite to a ZTA crush party.
frat guy #2 - who's it suppose to be from, you think?
frat guy #1 - i don't know but there was the girl i met at our band party. could be her.
frat guy #2 - we'll just have to wait and see.
Crushday is where you ask out ur crush and spend the day with them
Guy: Hey today is Crush day
Girl:cool
Girl 2:what's crush day
Girl and boy:WHAT YOU DONT KNOW
girl 2:no sorry
Guy: crush day is where u ask out your crush and spend day with them
Girl 2:Ohhh okay