Variation of "rad", itself an abbreviated form of "radical". Northern Californian in origin, specific to Berkeley, especially University of California math/computer science students. Usually considered "geeky".
Often used in conjunction with the modifier "hella", as in "Last month's Critical Mass bike ride was hella k-rad!"
by Carlos Pecciotto September 30, 2005
orgin; oldskool haxx0r typea (adj.)Some say it comes from a combination of the words 'kool' and 'rad' (K-Rad); Meaning not just kool, not just rad, but kool AND rad. :)
by deexm February 15, 2003