fifth wheel

• Persona que no es deseada, necesaria o que se siente superflua en una situación social, especialmente cuando es el único soltero en un grupo de parejas o amigos íntimos.

A person who is unwanted, unnecessary, or feels left out in a social situation, especially when they are the odd one out in a group of couples or close friends.

1. Unwanted or superfluous personB2informal

   A person who is unwanted or unnecessary in a social situation, often because they are not part of a couple or group.

   Quinta rueda

   • I felt like a fifth wheel when all my friends brought their partners to the party.
   • He was the only single person there, so he felt like a fifth wheel.
   • Don't be a fifth wheel; join our conversation.