On my income, I can't afford to be 'extravagant'. [=I can't afford to buy expensive things that I don't need]
The company has been making 'extravagant' claims/promises about the drug's effectiveness.
He went to 'extravagant' [='elaborate, extreme'] lengths to impress his boss.
(..) - Yes, boss. Come right back. Yes, boss. - Hello, Rick. - Hello, Louis. How extravagant, throwing away women like that. Someday, they may be scarce. I think I shall pay a call on Yvonne. Maybe get her on the rebound. When it comes to women, (..)1942 Casablanca