wicked, great, fantastic, sublime. Can be used all by itself, or in a sentance.

a phenomenon in which electrons are emitted from matter (metals and non-metallic solids, liquids or gases) as a consequence of their absorption of energy from electromagnetic radiation of very short wavelength, such as visible or ultraviolet light. Electrons emitted in this manner may be referred to as "photoelectrons".

A word that means "awesome" "sweet" "badical"...etc.
It is used as an adjective.

to be totally awesome
commonly used among 80's skaters
However, Bitchin is making a comeback

A very good time, in comparrison to the word "bitching", which means one who complains the fuck out of you.

"bitchin" is an idiomatic expression originally from the left coast of the United States of America, circa mid to late 1970s, coinciding with the rise of Disco(the Bee Gees), and the "BITCH" fashion trend (where young "woman's libbers" commonly wore necklaces and shirts emblazoned with "BITCH"), used originally by "surfer types", deriving from "man that wave is a bitch" to "what a ride, that wave was bitchin'". It quickly spread to main stream American vernacular as an affermation.

Prodigiously beautiful, rad, boss ... etc.