From Longman Dictionary of Contemporary Englishspare changespare changeENOUGHcoins of little value that you do not need and can give to other people There are beggars on every corner asking for spare change. → spare
Examples from the Corpus
spare change• Homeless children scrounge for spare change, and newspapers carry ads from people offering their kidneys for cash.• The bottom line: That guy on the street asking for spare change is actually doing you a favor.• A spare change of underclothing is desirable for those who value comfort. 