Webtrovert 

Someone who is a shy introvert in real life, but turns into a full-on extroverted party animal on Internet forums and social sites.

Man, she was on Facebook flirting with everyone and talking about all her wild parties, but when we met in person she just stared at the floor and mumbled everytime I asked her something.

Yeah, sounds like she's kind of a webtrovert.

Webtrovert by Squidmonkey June 13, 2011

WoWtrovert 

Someone who plays World of Warcraft so much that they no longer engage in any other activities, like eating or sleeping.

Billy is now intravenously fed ever since he became a WoWtrovert.

WoWtrovert by Donxiote March 13, 2009

Wintrovert 

A personality type where one becomes quieter, more introverted, more withdrawn in the winter.

"She'd rather spend New Year's Eve at home, she's a wintrovert."

Wintrovert by inkinmytea November 10, 2014

Wintrovert 

Someone who develops extreme hermit-like, anti-social tendencies due to cold and or snow. Wintroverts tend to be social during nice weather so the prolonged shut-in behavior is seasonal more than typical.

Sarah: Hey, we should go grab a post-holiday cocktail soon.
Ken: I would but I become such a wintrovert this time of year. See ya in the spring.

Wintrovert by Sarah G January 11, 2017