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general::
Phrase(s): head for the hills [and] take to the hills; run for the hills
1. Lit. to flee to higher ground. • The river’s rising. Head for the hills! • Head for the hills! Here comes the flood! 2. Fig. to depart quickly. • Here comes crazy Joe. Run for the hills. • Everyone is heading for the hills because that boring Mr. Simpson is coming here again.
McGrawhill's American Idioms And Phrasal Verbs