A Maserati
Problem is the kind of problem or issue that your startup company
will, presumably, experience some day.
"Some day" being when you're making millions of dollars in revenue, you have 100 employees, and you're driving around in a Maserati.
Calling
something a Maserati Problem, then, is akin to saying you probably shouldn't be worrying about it if your closed beta is still 2 months from launching.
Person 1: "What kind of budget do you think we should set for miscellaneous
pen and
pencil supplies in our supply cabinet, given that a certain number of employees
will steal a given amount per month?"
Person 2: "Uh, I think that's a bit of a Maserati Problem."