The well recognized first word to the song "Won't Get Fooled Again" by The Who, as the OP for CSI: Miami. This has been used at the butt of jokes using the Horatio Caine meme. (In actuality, the word is spelled "Yeeaaahh (with an indefinite amount of h's)" on the image.
"H, a woman jumps in front of a man's car and gets run over. Who's fault is it?"
Possibly the best game genie code for super Mario bros, it causes glitchy graphics and colors that continually get glitchier, all enemies become headless bowsers, and when you hit the flagpole you get a disco party.
WARNING: Flashing Images, DO NOT USE if you are epileptic