gravy

Từ điển Oxford Advanced Learner 8th

gravy [gravy gravies] BrE [ˈɡreɪvi] NAmE [ˈɡreɪvi] noun uncountable
1. a brown sauce made by adding flour to the juices that come out of meat while it is cooking
2. (NAmE, informal)something, especially money, that is obtained when you do not expect it
•Anything on top of eight percent profit is just gravy for the industry.

Word Origin:
Middle English (denoting a spicy sauce): perhaps from a misreading (as gravé) of Old French grané, probably from grain ‘spice’, from Latin granum ‘grain’.

• Từ đồng nghĩa / Synonyms:
  boom, bonanza, gold rush, godsend, manna from heaven, windfall, bunce, pan gravy