chinless
From Longman Dictionary of Contemporary Englishchinlesschin‧less /ˈtʃɪnləs/ adjective British English lacking courage or determinationExamples from the Corpuschinless• There was nothing in his chinless face of the awesome wonder that Gabriel usually looked down on.• The chinless type who made her feel ill-bred.• This time, though, Chinless Wonder stuck his head out of the van and said something to the rider before he went.• Too bad Henry Phipps happened to mention your father's debts to that chinless wonder you had on the string.