Definitions:

1. Describes someone or something that stands out as unique, unusual, or not belonging to a particular group or situation. NOUN
   • When the friends paired up for the game, one of them was the odd man out.
2. Refers to a person or thing that is different from the others in a group or does not fit in with the rest. NOUN
   • In a family of athletes, she was the odd man out with her love for painting.
   • In the team of experienced professionals, the intern felt like the odd man out.
3. Someone or something is not like the others in a group, either in appearance, behavior, or characteristics. NOUN
   • The blue chair was the odd man out in a room full of red furniture.

Synonyms:

• exception
• fish out of water
• kook
• misfit
• odd fellow