flip-flop
verb /ˈflɪp flɒp/
  /ˈflɪp flɑːp/
 [intransitive] (especially North American English, informal)Verb Forms
| present simple I / you / we / they flip-flop |  /ˈflɪp flɒp/  /ˈflɪp flɑːp/ | 
| he / she / it flip-flops |  /ˈflɪp flɒps/  /ˈflɪp flɑːps/ | 
| past simple flip-flopped |  /ˈflɪp flɒpt/  /ˈflɪp flɑːpt/ | 
| past participle flip-flopped |  /ˈflɪp flɒpt/  /ˈflɪp flɑːpt/ | 
| -ing form flip-flopping |  /ˈflɪp flɒpɪŋ/  /ˈflɪp flɑːpɪŋ/ | 
- flip-flop (on something) to change your opinion about something, especially when you then hold the opposite opinion- The vice-president was accused of flip-flopping on several major issues.
 Word Originmid 17th cent. (in the general sense ‘something that flaps or flops’): imitative reduplication of flop.

