third wheel (English, noun)
expansion: third wheel (plural third wheels)
Senses:
glosses: An individual or object that serves no useful purpose.
tags: idiomatic
glosses: A third party, usually unwanted, accompanying two people on a date.
tags: idiomatic
glosses: Used other than figuratively or idiomatically: see third, wheel.
Forms:
form: third wheels
tags: plural
form: 3rd wheel
tags: alternative