backup man

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backup man
n : someone who takes the place of another (as when things get dangerous or difficult); "the star had a stand-in for dangerous scenes"; "we need extra employees for summer fill-ins" [syn: stand-in, substitute, relief, reliever, backup, fill-in]

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Noun
1. someone who takes the place of another (as when things get dangerous or difficult); "the star had a stand-in for dangerous scenes"; "we need extra employees for summer fill-ins"
(synonym) stand-in, substitute, relief, reliever, backup, fill-in
(hypernym) peer, equal, match, compeer
(hyponym) locum tenens, locum