1. old-fash = old-fashion
不時尚的，老土的,
out of fashion, not modern，out dated, not stylish
或者
老的用法，過時的用法
old way of using the word or sentence
我覺得字典出現old-fash應該是這個舊的用法的意思
2. old-fashioned
是壹種雞尾酒
a kind of cocktail .
served in a short, round, 8–12 ounce tumbler-like glass, called an Old-Fashioned glass, named after the drink.