PAIN IN THE NECK
an irritating, annoying person
someone who prefers his own company and does not like socializing. We can also say a lone bird.
a person who complains a lot about insignificant things.
a person who ruins other people’s fun by staying pessimistic and complaining all the time.
a person who moves from place to place, job to job, without staying anywhere long
a shy person, usually a girl who has no one to talk to or dance with at a party