flatter
verb /ˈflætə(r)/
  /ˈflætər/
Verb Forms
Idioms | present simple I / you / we / they flatter |  /ˈflætə(r)/  /ˈflætər/ | 
| he / she / it flatters |  /ˈflætəz/  /ˈflætərz/ | 
| past simple flattered |  /ˈflætəd/  /ˈflætərd/ | 
| past participle flattered |  /ˈflætəd/  /ˈflætərd/ | 
| -ing form flattering |  /ˈflætərɪŋ/  /ˈflætərɪŋ/ | 
- [transitive] flatter somebody to say nice things about somebody, often in a way that is not sincere, because you want them to do something for you or you want to please them- Are you trying to flatter me?
 
- [transitive] flatter yourself (that…) to choose to believe something good about yourself and your abilities, especially when other people do not share this opinion- ‘How will you manage without me?’ ‘Don't flatter yourself.’
 
- [transitive] flatter somebody/something to make somebody look attractive; to make somebody seem more attractive or better than they really are- That colour doesn't flatter many people.
- The scoreline flattered England (= they did not deserve to get such a high score).
- He agreed to do the interview because it flattered his ego (= made him feel important).
 
Word OriginMiddle English: perhaps a back-formation from flattery.
Idioms 
be/feel flattered 
- to be pleased because somebody has made you feel important or special- He was flattered by her attention.
- I felt flattered at being asked to give a lecture.
- She was flattered to hear that he had been asking about her.
- I suppose we should be flattered that he agreed to come at all.
 
flatter to deceive 
- (British English) if something flatters to deceive, it appears to be better, more successful, etc. than it really is- As with many new bands, their early success flattered to deceive.