Geexy

This is a word that the English language is sorely lacking.

Geexy, adj. --
Pronounced [gee-ksee] --
When someone is both geeky and sexy; a smart, sexy person; esp. when doing / saying something nerdy

Ex.

Hot person says "Did you know that a googol is the number 1 followed by 100 zeros"
Observer notes "Damn you are so Geexy right now."