Her decision to leave the company proved to be an 'expensive' mistake. [=a mistake that caused her to lose a lot of money]
They live in an 'expensive' neighborhood. [=a neighborhood in which houses, apartments, etc., cost a lot to buy or rent]
an 'expensive' shop [=a shop that sells expensive things]
(..) - I ordered the sides, so... - Sides? Sides? $. dollars, worth the sides? What are this sides? That cures cancer? This sides did cure cancer, that's the problem, that's why they were expensive. - Shut the fuck up! - I'm serious... - I know... - Stop! EJ Entertainment, what the (..)2013 The Wolf of Wall Street
(..) $. dollars for one fucking dinner! Okay, no, no, no this could be explained. Dad, we had client, we have the Visa client. Right, the porter house from Argentina. The expensive champagne and wine, we have to buy champagne... And you go it all the fucking sides. Tel him about the sides order. (..)2013 The Wolf of Wall Street