bib
noun /bɪb/
  /bɪb/
 Idioms - a piece of cloth or plastic that you fasten around a baby’s neck to protect its clothes while it is eating围嘴;围兜 
- (especially British English) a piece of cloth or plastic with a number or special colours on it that people wear on their chests and backs when they are taking part in a sport, so that people know who they are(运动员佩戴的)号码布,彩色身份标记 
词源late 16th cent.: probably from Latin bibere ‘to drink’.
Idioms 
your best bib and tucker 
- (humorous) your best clothes that you only wear on special occasions(个人)最漂亮的衣服