Green’s Dictionary of Slang

(US campus) extremely good or exciting; also as excl.

1982		M. Pond Valley Girl’s Guide to Life 55: Excellent—What dudes say instead of mega major maximum brilliant, they just go, ‘Excellent, man.’.
1989		Matheson & Solomon Bill and Ted’s Excellent Adventure [film script] That is exactly why we need a triumphant video....Excellent!
1991		M. Myers et al. Wayne’s World [film script] Wayne and Garth: Wayne’s World / Wayne’s World / Party Time / Excellent!
1996		John Cleland ‘Ramblings of a Weary Traveller’ 🌐 One of those nice people in Minneapolis is Steven Brust, a talented author and musician, a dangerous poker player, a sharp wit and all around excellent dude.
2000		A. Garland Beach Film Tie-In 44: After it was gone, Sammy said in an awestruck voice, ‘Most totally excellent, dude!’ Zeph quickly followed it up with, ‘Like, utterly outrageous, compadre!’.
2006		P. Mulligan Life and Times of a Hollywood Bad Boy 178: Dude that was awesome. What a show. First an ass-kicking diving display, followed by near death and ambulances. Whoa, most excellent, dude.