busybody
a person who is too interested in things that do not involve them
fat cat
someone who has a lot of money, especially someone in charge of a company who has the power to increase their own pay
chatterbox
a person, especially a child, who talks a lot
to be (as) nutty as a fruitcake
to be a very strange or crazy person
cheapskate
a person who is unwilling to spend money
backseat driver
a person who gives unwanted advice or criticism, esp. to the driver of a car
worrywart
a person who often worries, especially about things that are not important
slimeball
a very unpleasant person whose friendly manner is not sincere
cold fish
someone who seems unfriendly and who does not share their feelings
oddball
a person whose behaviour is unusual and strange
copycat
someone who has few ideas of their own and does or says exactly the same as someone else
armchair critic/gardener/traveller
used to refer to a person who knows, or says they know, a lot about a subject without having direct experience of it
