When the medium of electrical transfer takes a shorter path back to the power source (cell or batteries) thus shortening the circuit, and leaving out the resistor (motor, lightbulb, buzzer etc.).
Short circuiting will drain the power source at a phenomenal rate, and is best avoided. The most commonly used method of prevention against this is the (see my definition of) fuse
When I was learning this crap in school a few years back we constantly short circuited all our shit toghether to create huge sparks that whooped the batteries in minutes.
A Song Created By Daft Punk in The 90's.Was First Released in a live concert called "Alive 1997".Was Re-Released On An Album in 2000 called "Discovery". This Song Contained Only One Sample : The Ballad Of Dorothy Parker by Prince.