1a man who tries to secretly watch women when they are wearing no clothes
peeping tom
2a person who refuses to believe anything until they are shown proof
doubting Thomas
4used to refer to an ordinary person or all ordinary people
Tom, Dick or Harry
5to always want to own the same expensive objects and do the same things as your friends or neighbours, because you are worried about seeming less important socially than they are
keeping up with the Joneses
6to have never met someone and not know anything about them
i dont know him from Adam
7to borrow money from one person to pay back money you borrowed from someone else
rob peter to pay Paul
8used to refer to something being done or happening very quickly
before you could say Jack Robinson