(of a man 男子 having a very small chin (= part of the face below the mouth) (often thought of as a sign of a weak character) 下巴短小的（常被认为性格软弱） Oxford Collocations DictionaryChinless is used with these nouns:- wonder
Idioms
a chinless wonder
- (British English, humorous, disapproving)
a young, upper-class man who is weak and stupid 上流脓包；上流青年懦夫