spend a fortune—spend a large sum of money:
- Williams was found guilty at his first two trials, and spent a fortune on appeals over an eight-year period.
spend a penny—(UK euph.) visit a lavatory:
- Where’s the bathroom? Us girls are going to spend a penny!
Note: The expression does not correlate in meaning with the phrase put one’s two cents in—(U.S.) add one’s comments or opinion on the matter (also: throw one’s two cents in):
- Since the subject has been brought up I feel compelled to put my two cents in.