The phrase a bad penny refers to a person or thing which is unpleasant, dishonorable, or unwanted that is likely to reappear, particularly at inconvenient times.
a fool and his money are soon parted
Meaning:
this means that stupid people spend money without thinking about it enough.
all that glitters is not gold
Meaning:
appearance is sometimes misleading. Things that appear valuable or worthwhile might not be as good as they look.
bet your bottom dollar
Meaning:
This idiom is used to say that one is sure about something.
blank cheque
Meaning:
that one is given an unlimited freedom of action.
come at a price
Meaning:
something negative or unpleasant occurs as a consequence.
come into money
Meaning:
you get some money unexpectedly, usually by inheritance.
cut your losses
Meaning:
This idiom is used to mean that you should do something to avoid losing any more money.
dime a dozen
Meaning:
Said about anything that is common, inexpensive, and easy to get or available any where.
drop a dime
Meaning:
to drop a dime means to make a phone call, usually calling the police to inform on or betray someone.
for love nor money
Meaning:
said when it is difficult to get something or persuade someone.