Alabama Slammer

This is a classic cocktail and appears in print as early as:

Playboy bartender's guide by Thomas Mario in 1971

"ALABAMA SLAMMER 1 oz. Southern Comfort 1/2 oz. sloe gin 1 oz. amaretto 1/2 oz. lemon juice Pour into highball glass over rocks. Stir."

This drink was likely given it's name because of it's ingredients, southern comfort. Southern Comfort might be the proprietors of this drink, although there is no literature suggesting this. This drink belongs to the southern comfort era. This drink also appears in :

Random House word menu by Stephen Glazier in 1997

"Alabama slammer amaretto. Southern Comfort, sloe gin and lemon juice"

This drink dates between 1967 and 1970 and contained at least as of then:

Shake these ingredients:

Southern Comfort

Amaretto

Sloe Gin

Strain into a shot glass.

Add charged lemon-lime soda.

Place a cocktail napkin over the shot glass and slam against the bar

Books

https://www.amazon.com/s/ref=ntt_athr_dp_sr_1?_encoding=UTF8&field-author=Expert%20Master%20Mixologist%20David%20Herpin&search-alias=digital-text&sort=relevancerank

Udemy Course

https://www.udemy.com/professional-bartending/