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Phrase(s): *in someone’s hair
1. Lit. tangled in someone’s hair. (*Typically: be ~; get [into] ~.) • My bubble gum got in my hair and I had to cut it out. 2. Fig. annoying someone. (*Typically: be ~; get [into] ~.) • You can watch what I am doing, but don’t get in my hair. • I wish you wouldn’t get in my hair when I’m trying to do something.
McGrawhill's American Idioms And Phrasal Verbs