Overdraft rip off
When banks process your largest transactions first and your smallest ones last. This process only happens when you don't have enough money in your bank and the bank delays your smaller pending transactions to screw you in the asshole with insufficient funds fees.
Dude 1: "Fuck dude! My bill came through today and so did all the money I spend over the weekend!"
Dude 2: "That was like 4 days ago! Fucking overdraft rip off!"
Dude 1: "Tell me about it... that burger ended up costing me $40..."