An individual's fixed monthly expenses, such as rent, utilities, cell phone, Internet access, car payments, car insurance, etc. These are the bills you have to pay regardless of what you do in a particular month. Can also be used more generally to describe one's monthly expenses, regardless of whether they are fixed or variable.
If I'm going to make a living as a jazz trombonist I have to keep my monthly nut small.
by monkey1235 May 28, 2013