bib/bɪb; bɪb/ n1 piece of cloth or plastic fixed under a child's chin to protect its clothes while it is eating （小儿用的）围嘴.2 front part of an apron, above the waist 围裙的上部（腰以上的部分）.3 (idm 习语) one's best bib and tucker => best1.
牛津英汉双解词典