smurf account

Etymology
Coined by Geoff Fraizer and Greg Boyko, who played the online multiplayer game  under the names Shlonglor and Warp. The pair had become so proficient at the game that few people would play against them, so, in order to avoid scaring off potential competitors, they created alternate accounts named PapaSmurf and Smurfette (characters from the Smurfs comic franchise). However, the term first appears c. 1997. See cite below.

Noun

 * 1)  An alternative computer account used by a known or experienced user in order to deceptively self-present as someone naïve or less experienced.