He's a real backslapper if he thinks you're important, but if he finds out you're not a bigshot, he won't even bother to say hello to you.

要是他认为你是一个重要人物，他就会和你拍肩握手地表示友好；可是如果他发现你不是大人物，他连招呼都懒得和你打。" 今天我们给大家讲解了两个习惯用语，第一个是：backslider。

youdao

Yet whereas Mr Cheney was seen as the grey eminence behind the sometimes buffoonish Mr Bush, Mr Biden seems a cheery backslapper compared to the professorial Mr Obama.

ECONOMIST: More vice than virtue