Slim Shady is the alter ego of rapper Eminem, introduced in the late 1990s and central to albums such as The Slim Shady LP and The Marshall Mathers LP. The idea of Shady returning became a running hook in his music, most famously in the 2002 single Without Me with its repeated guess who's back refrain. Online, short return lines using the name have been reused as soundboard clips and edit cues, signalling a comeback in a way audiences who grew up with those songs immediately understand.