half-cock
adjective UK old-fashioned uk/ˌhɑːfˈkɒk/ us/ˌhæfˈkɑːk/
go off at half-cockUK (US go off half-cocked) 未安排好就仓促行事，过早行事
to fail because of not being well planned or because of starting too soon
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。