The Titanic is when you are getting head in a hot tub and the girl is underwater blowing you. You wait, and when she comes up for air, you hit her in the face with a big bag of ice.
Guy 1: "Dude, I gave that girl a Titanic last night!"
Guy 2: "Nice man, how did it go?"
Guy 1: "It was awesome man, I hit her with the ice and screamed 'Never Let Go!'"