what’s the definition of ‘slush fund?’

Good old Joe Crowley is at it again.

After he was caught using his campaign as a slush fund to pay his lobbyist brother more than $70,000 in rent, it turns out his campaign treasurer’s son has also raked it in:

Rep. Joe Crowley paid out more than $10,000 to his campaign treasurer’s son — starting when the kid was only 14 years old, The Post has learned.

Jacob Kaufman, 18, started handling “birthday card mailings” for Crowley’s campaign in February 2013, several months before his 15th birthday, and continued to receive payments through March of this year, records show.

Every week exposes more of Joe Crowley’s shady behavior.

Given Crowley’s penchant for using campaign contributions to line the pockets of family and friends, he may want to save some for a good lawyer…