I say hold that shit in becuz only suckaz take shitz when they have to. Real G'z hold that shit in for 8 hours after they are conciously aware that its time.
When your finally bout to drop it tho, find the hottest bitch you know, use her bathroom and do this:
Take of the lid to the toilet and shit up in that tank part of the toilet. When her fine ass uses the toilet and flushes, your bomb will enter her toilet bowl clearly establishing your dominance over her punk ass. She will know it was you and will know that you are truly better then her.