people often user it as n. or adj, means needy, difficult to live ,andmiserable wilh hunger and cold,
in brief,poor,have nothing can't live on
it usually used by Northman.
when the child don't work hard, parents could use it ,like this" if you play all day now, you‘ll live on air"
人们经常把它用作名词或形容词,意思是,生计艰难,饥寒交迫。简单地说是贫穷 ,一无所有
通常是北方人使用
当孩子贪玩,不用功的时候,父母会用它 ,比如这样说“如果你整天玩,你以后一定喝西北风,没有钱,不能生活”