Green’s Dictionary of Slang

Colorado Kool-Aid n.

(US) Coors beer.

1972		D. Jenkins Semi-Tough (1978) 33: Big-un would drink himself a lot of that Colorado Kool-Aid.
1978		Johnny Paycheck ‘Colorado Kool-Aid’ 🎵 Well, I was sittin’ in this beer joint down in Houston, Texas. / Was drinkin’ Colorado Kool-Aid and talkin’ to some Mexicans.
1984		K. Weaver Texas Crude 66: Colorado Kool-aid. Coors beer.
2002		Newsday Online 6 Oct. 🌐 In nearby Golden, Coors is canned and bottled at the world’s largest single brew site. Back in the days of ‘Smoky and the Bandit,’ visitors from everywhere smuggled cases of this ‘Colorado Kool-Aid’ home with them.