walk-around money

noun2

1. •
   (informal) Money for use on trivial items while walking around.

   • Twenty dollars between the three of us wasn't a lot, but it was walk-around money for grub and cigarettes. — 2012
2. •
   (US, informal) Money from a political campaign for use ensuring supporters bring voters to the polls, both for legitimate get out the vote efforts and political corruption.

   • Parker: I'll tell you what I would like: another 75 in cash for walk-around money. Royce: 75, hm? Call another game. — 2006