someone who is rather unfriendly and seems to have no strong emotions
a cold fish
someone who prefers to be on his/her own
a loner
very good, honest, and reasonable, and not thinking you are special in any way
salt of the earth
a person who gets up or arrives early, or who does something before other people do
an early bird
a person who does not like other people enjoying themselves
a killjoy
someone who is always annoying people
a pain in the neck
someone who spends all her time sitting at home, in front of the television
a couch potato
someone who has a lot of ability and a strong wish to be successful and is therefore expected to achieve a lot
a high-flyer
very tough and not always caring about other people's feelings
as tough as nails
a very difficult and unhelpful person
an awkward customer
a person who prefers to be awake and active at night
a night owl
o have an angry or unpleasant attitude or way of behaving caused by a belief that one has been treated unfairly in the past
to have a chip on one's shoulder
a person who is too interested in things that do not involve them
a busybody
a person who behaves as if they know everything
a know-all
someone who talks too much about really boring things
a windbag
someone who enjoys deliberately causing problems or starting arguments
a troublemaker
someone who is old-fashioned and too serious and avoids enjoyable activities
a stick-in-the-mud
someone who is very kind and always tries to do good, even if not always successful
his/her heart's in the right place
a person who makes others work very hard
a slave driver
someone who never changes his mind even when everybody tells him he is being unreasonable
as stubborn as a mule