挂幌子 meaning in Chinese

[方言]
1.(在商店门前悬挂标志或记号) (of shops) put up a signboard to advertise goods
2.(比喻某种迹象显露在外面) give oneself away 短语和例子
他刚才准是喝了酒, 脸上都挂幌子了。 he must have had a drink or two a moment ago, for his face shows it