A social atmosphere that may encompass many subjects including but not limited to books, video games, fantasy, horror, comics, trivia, computers, electronics, board games, cosplay, anime, science, physics. It tends to be a very laid back and welcoming environment, regardless of the diversity of the crowd.
The nerdmosphere at the local bar that boasted a vintage arcade and a variety of board games was alwaysfun and entertaining.
Combination of internet and sphere, meant to refer to really any group of internet things that are tangentially related, like two or more fandoms in the same genre of game or music.
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.