pocket change
From Longman Dictionary of Contemporary Englishpocket changeˈpocket ˌchange noun [uncountable] American English 1 a small or unimportant amount of money The money is nothing – pocket change to them.2 coins that you carry in your pocketExamples from the Corpuspocket change• That is why he was here Saturday night, fighting on Fox for pocket change.• A rich good guy who could buy and sell drug lords out of his pocket change.• Urgent Request won that race as only a 2-1 favorite, but it would have been nice pocket change for the owner.• Admission is $ 4 at the door, leaving plenty of pocket change for amorous pursuits.