4E75

From Sonic Retro

4E75 is an instruction in the machine code of the Motorola 68000, the processor used in the Sega MegaDrive/Genesis. Its assembly language mnemonic is RTS, or ReTurn from Subroutine.

Some people who know about hacking in the Sonic scene (mostly at The Sonic 2 Beta Page) use it as a joke, meaning "go away" or, more abrasively, "get the fuck out". 4E75 is not a form of Leet 13375P34K, but rather a cryptic way to let someone know that they are not welcome. This usage was introduced by Quickman and popularised by Fiz, but has recently fallen out of favor for lack of usage opportunities (the membership approval structure keeps away most of the undesirables).