What is another word for third wheel?
Pronunciation: [θˈɜːd wˈiːl] (IPA) 
The expression "third wheel" is commonly used to refer to someone who is an unnecessary or unwanted addition to a social situation, particularly when it involves a romantic relationship between two people. Some synonyms for this phrase include "excess baggage," "odd man out," "extra person," "spare tire," "fifth wheel," "outlier," "tagalong," "hanger-on," "interloper," "intruder," and "uninvited guest." These terms all have slightly different nuances and connotations, but they are generally interchangeable in informal conversation. Whether you're trying to politely decline an invitation or navigate an uncomfortable social dynamic, there are plenty of ways to describe feeling like the proverbial third wheel.
