head on collision

The impoverished form of an Irish Car Bomb (Bailey's dropped into and chugged from a Guinness). A head on collision is Kahlua dropped and chugged from a Busch Light.

1) Serve a shot of Kahlua
2) Drop into a cup of Busch Light
3) Chug in one gulp

"-Yo, let's do an Irish Car Bomb.
-Nah, that's too classy, I'll take a head on collision"