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Phrase(s): *a leg up
Fig. a kind of help where someone provides a knee or crossed hand as a support for someone to place a foot on to get higher, as in mounting a horse or climbing over something. (*Typically: get ~; have ~; give someone ~.) • I gave her a leg up, and soon she was on her horse. • Can I give you a leg up? • Could I please have a leg up?
McGrawhill's American Idioms And Phrasal Verbs