In the TV show "
Pimp My Ride", host
Xzibit reveals each newly pimped-out vehicle with the line "Sup dawg, we heard you like X, so we put a Y in your car so you can Z while you drive".
The Internet liked this line, and started creating its own versions; a meme was born. By the time the picture above appeared, the phrase had mutated into "Yo dawg", and the focus of the meme had shifted to the concept of things inside (or on top of) other things — most commonly presented as an
image macro, with or without a superimposed image of a smiling Xzibit.