in the used car business, a customer or potential customer US, 1968.
3
the soldier on point in the front of a patrol US, 1991
2.verb
to blackmail someone UK, 1987
idiommousequiet as a mousespoken used in order to say that a person or animal is very quiet:I won't disturb you - I'll be as quiet as a mouse."Is Daniel asleep?" "As quiet as a mouse."