be a third wheel

Meaning: To be an unwanted extra person with a couple.

Language: English

Literally: (Already vivid in English)

Example: “I went to dinner with Sam and his new girlfriend and felt like a third wheel.”

Category: Daily Life

Origin: A two-wheeled vehicle has no use for a third wheel. An older form was "fifth wheel," from the fifth wheel of a carriage. "Third wheel" became common in the 20th century.

Equivalents in other languages

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