pork barrel

Short definition from Wiktionary

Noun

1. 1
   A barrel used to store pork.
2. 2
   A ready supply of income; one's livelihood.
3. 3
   State funds as assigned for local or regional expenditure; especially, central money used for regional projects which are eyecatching or designed to appeal to voters.
4. 4
   Alternative spelling of pork barrel.