According to Wikipedia, All Your Base Are Belong To Us:

"All your base are belong to us" (sometimes referred to as "All Your Base" and often abbreviated AYBABTU, AYBAB2U, or simply AYB) is a phrase that sparked an Internet phenomenon in 2001 and 2002. The text is taken from the opening found in the English version of the Japanese video game Zero Wing, the translation of which was terrible to the point of hilarity. The game was originally produced by Toaplan in 1989. Groups of game enthusiasts began digitally altering various images to include the phrase. Eventually, these images were collected together onto one site, Tribalwar, and a Flash animation produced from them, which was widely downloaded.

Another good meme is also the "Thank you Mario, but our princess is in another castle!"

Why do I blog this? even though it's 5 years old, the meme is still there, showing how the Internet's can spread specific messages (uncovered by the traditional mass media as said in the Wikipedia definition) and then "install" it in the network's memory.