Short for controlled detonation which occurs when you are having intercourse and are not using protection. Just prior to climax you pull out and transfer the shaft to a secured location in the females mouth. Once the lips have formed a complete seal you release the ejaculation without fear of pregnancy or a sticky mess with stubborn stains. This provides protection to the cervix, eyes, nostrils and external auditory meatuses...or meati whatever. Loss of control can occur with premature evacuation.
Guy #1: So you took off with that chick last night, how did things go?
Guy #2: Well, things went great, we got going, but then I realized we didn't have any condoms.
Guy #1: So what did you do, you give up.
Guy #2: Hell no, I just pulled out and went for a controlled det.
Guy #1: Totally, no muss no fuss.