Stealth Geek is a geek who processes more information, on average, in a better way, despite the fact the knowledge he processes isn't necessarily useful. The fact someone is a geek is "Stealthed" until someone within earshot of the "Stealth Geek" mentions video games, PCs, consoles, software, roleplaying games or some other such "uncool" item, at which point the "Stealth Geek" drops "Stealth Mode" and his geekiness spews out.
Most "Stealth Geeks" fit in with the popular crowd and bash geeks who don't seem "cool" right off the bat, at least initially.
An unemployed adult that mooches off his parents or spouse. Plays with action figures and considers themself to be a writer despite not selling any books. Spends all their time on Twitter arguing with trolls and losing.
StealthGecko, a Gothic white kid in North Carolina, amazingly brought home two $5,000 checks from Quake 3 tournaments. He currently plays an online game called "Soldier Front", and he's still getting used to the fact that the bullets don't go straight, even at close range, regardless of the fact it's supposed to be a "realistic game" He plays on multiple accounts, including the following.
DarkSoD
Dr_Gecko
ZeroSoD
StealthGecko
and
SpecialGecko
DarkSoD wallhacks! DarkSoD aimbots! DarkSoD is pro! DarkSoD you noobcheater! StealthGecko hacks!
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).