There are many definitions. Okay, I have never swallowed live animals or bugs. I guess this one fits.

He was the very personification of a ‘geek’, a bright young man turned inward, poorly socialized, who felt so little kinship with his own planet that he routinely traveled to the ones invented by his favorite authors, who thought of that secret, dreamy place his computer took him to as cyberspace — somewhere exciting, a place more real than his own life, a land he could conquer, not a drab teenager’s room in his parents’ house.

Julie Smith, New Orleans Beat

Alright. I have my own place, but then I am not a teenager anymore, and I would not describe myself as bright (out of modesty), but there you go.