beer-liquor rule
sonia forgot the beer-liquor rule on a friday night and missed her hair appointment the next morning
"the [beer]-[liquor] rule is a guideline for [alcohol] consumption that goes like this:  "liquor before beer, nothing to fear
"sonia forgot the beer-liquor rule on a friday night and missed her hair appointment the next morning" What is the definition of "beer-liquor rule"?