To feel obligated to argue, return or reject something over something as small as a penny.
"I felt Jewbligated to buy 2 smaller jars of peanut butter for 2 pennies less than 1 larger jar."
"I gave you $20 for a 9.99 bill and you only gave a 10 back, where is my penny dammit!"
"I found this same product 2 cents cheaper next door I'll just get it there instead."