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Phrase(s): close in for the kill [and] move in for the kill
1. Lit. to move in on someone or something for the purpose of killing. • The wolves closed in for the kill. • When the lions closed in for the kill, the zebras began to stampede. 2. Fig. to get ready to do the final and climactic part of something. • The car salesman closed in for the kill with contract and pen in hand.
McGrawhill's American Idioms And Phrasal Verbs