A person of high intelligence or great knowledge of topics no one else cares about, usually with low social skills, but also has physical ability.

A rare breed of human. One who has both higher intelligence and higher physical abilities than his peers. Though he can fit in with either social group, he feels out of place in either for a long period of time.

Anyone who understands most or all of the math/science related jokes on Futurama

When you play Gameboy, P.S.P., D.S.ect. under a blanket forming a dome around your self. Kev. & I made this word.

Due to the particular font chosen by Caffe Nero (a large UK Coffee house chain) for their company logo, it is often mistakenly read as 'Caffe Nerd'.

A large group of nerds of either one or multiple kinds, who are mutually friends. Like any gang, except that all members know calculus, have an opinion on the economy, philosophy, and will try to convert you to their OS/Browser/Console. And are less likely to be able to take you in a fight.
Sometimes acting as a guild with a monopoly on intellect, and other times as an average bunch of friends.

The ultimate in nerdnisity; nerdus maximus

To become a nerd for a temporary amount of time e.g. to study intensively.

Can be abbreviated as NIU.