backup man

Từ điển WordNet v3.1 - WordNet Dictionary

noun

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
• Derivationally related forms:
fill in (for: fill-in), relieve (for: reliever), substitute (for: substitute), stand in (for: stand-in)
• Hypernyms:
peer, equal, match, compeer
• Hyponyms:
locum tenens, locum, double, stunt man, stunt woman,
surrogate, alternate, replacement