出典:Wiktionary
go off halfcocked (三人称単数 現在形 goes off halfcocked, 現在分詞 going off halfcocked, 過去形 went off halfcocked, 過去分詞 gone off halfcocked)
Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for go off halfcocked under halfcock in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913)