R.H.U.
Short for Random Hook Up. Act of hooking up with a random person for personal non-attached pleasure. Term also used because it encode its true meaning from significant other, when discussing among friends.
I had the best R.H.U. last night. i need a R.H.U. don't tell my girlfreind about that R.H.U. That was the best R.H.U. i have ever had!