When you've just done a line of the old Colombian marching powder and you're guts start rumbling and give you the urge for a massive shit.

A Disco Poo is when you got to the toilet with your i-phone or i-pod on loud and play disco music whilst in a cubicle, doing your business. The more public the venue, the better, although you shouldn't be in a club or location where music overshadows your top tunes.