Hardly a Social Butterfly is an expression used to describe someone who is not very outgoing or sociable. This can be seen in the two crossword solutions, LONER (5 letters) and HERMIT (6 letters). A LONER is someone who prefers to be alone and avoids social interaction, while a HERMIT is someone who lives in isolation and avoids contact with other people. Both words are used to describe someone who is not very sociable or outgoing.