► 成句なんちゃって  [なんちゃって]  [なんて+言う+ちゃう+て]  [coll]  [peer]    
meaning:  joke  rank: 3☆ 
私って
凄い
美人。なんちゃってー! ⇨ I am incredibly beautiful. Oops, did I really say that? I’m just kidding!   
(☛ Literally “I let myself say that …”. A follow-up phrase after you made a silly or controversial comment.)