Someone who shows a great deal of skill while playing MMORPG's (massively mulitiplayer Online Role playing games) Generally Used as a Noun but can be used as an Adjective. Characteristics of a "Mendonky" are Quick progression within the Online Game, Consuming Large Amounts of Caffein and a Deficiency of sleep on a regular basis. Rare Cases Include the use of 13375P3AK (leetspeak) both verbally and written Or a confusion between the "Real world" and the "Virtual world"
"Oh My god, You're such a Mendonky"
"Hey man, Wanna Pull a Mendonky Tonight?"