third wheel

Meaning

1. noun A person or thing that serves no useful purpose.
2. noun A third party, usually unwanted, accompanying two people on a date.
3. noun Used other than figuratively or idiomatically: see third,‎ wheel.
4. verb Alternative form of third-wheel.

Similar words

good-for-nothing blivet random waste of space worthless person weed inutility zilch zero dead weight