prop someone/something up
- support or assist someone or something that would otherwise fail or decline
- spend a considerable time drinking in a pub
- provide support or assistance for someone or something that would otherwise fail or decline
Oxford American Dictionary
Don't be propping up your chin with your hand. ......? 好像沒有固定講法，基本上在歐美國家的教室裏應該聼不到這種訓斥。 圖片參考：http://l.yimg.com/f/i/tw/ugc/rte/smiley_33.gif
...2005/11/automakers_read.php Retailers slash prices to prop up sales http://www.independent.co.uk/news/business/news/retailers-slash...