a fifth wheel



a fifth/third wheel

  (American)
someone who is in a situation where they are not really needed or are ignored by other people I don't have a role in the office any more - I feel like a fifth wheel.
See also: fifth, wheel

Common Names:

NameGenderPronouncedUsage
Sayakasah-yah-kahJapanese
AimoIE-mo Finnish
Yevheniy-Ukrainian
Ioudith-Biblical Greek
Selena[si'linə]
Luben-Bulgarian