bankroll nit
n.— «Some people use the term “bankroll nit” for people who are very conservative about their bankrolls and who really have to win a lot of money at a given stake before moving up.» —“Online Poker: Interview With Dani ‘Ansky’ Stern” by Shawn Patrick Green CardPlayer.com Dec. 30, 2007. (source: Double-Tongued Dictionary)