backup man

Noun backup man has 1 sense

• backup man(n = noun.person) backup, fill-in, relief, reliever, stand-in, substitute - 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"
is a kind of compeer, equal, match, peer
has particulars: locum, locum tenens, double, stunt man, stunt woman, alternate, replacement, surrogate