When a soldier hits another soldier's kevlar helment with his own kevlar. Since the cover is usually green camo it looks like to turtles rubbing together, hence the name. I t isn't used much anymore because most soldiers are running around in desert uniforms now because of OEF and OIF
{Sneaks up from behind Joe Snuffy} Ow, what the fuck you hit me in the head for?
To light a cigarette off of another cigarette that is already lit
John: I need a light for my cigarette.
Bob: I don't have anymore matches, I'll just give you a turtle fuck.
When you do your bitch doggie style under the coffee table, when she sticks her head out the other side you punch it. Hince the word turtle fuck
Joseph turtle fucked his old lady that is why she has a knot on the back of her head
Two hard hats hitting, usually used in joke form with a new kid, or soft handed man, new to wearing a hard hat.
Joker: Dude, have you ever seen a turtle fuck?
Jokee: No, why?
Joker: Do you know what it sounds like?
Jokee: No, what?
Joker hits Jokee's hard hat with his own.
Military or construction worker slang for when one person slams his helmet on another persons helmet while on their head.
Hey shithead. Ever see a turtle fuck? No? WHAM!
The act of having sexula intercourse while the girl is under a coffee table, and when the girl sticks out a leg or an arm the man smacks it with a whiffle ball bat untill it goes back under the table.
What happened to my table?
Oh I was Turtle Fucking Amy under it!