egotistical is a user on the popular pool and snooker websites; funkypool and funkysnooker. The user's play often leaves opponents mystified and stunned.
Many believe egotistical to possess magical powers that allow him to perform so well at these games, leading to "egotistical" being used as a standard of play (see example). This use however is generally accepted to mean a slightly lower standard of play than that of the user egotistical, of course.
WOW i just played a guy who was playing very egotistical!!