what does this quote mean

"We'll have to tighten the belt a little bit and make due"

3 answers

This a class comment made by broke people. When you fall behind in your bills, then money gets short and you have "more month at the end of your money" then you find ways to save money, like: buying off brand food items, getting rid of cable, reducing you phone services, buying less leaner meat, buying apples in stead of pomegranates. Basically it mean to look from ways to save money due to financial hardship.
James is correct.

However, you have a spelling error at the end of your quotation. It's " ... make do." (not "due")

http://www.idiomconnection.com/mquiz.html#A1
Scroll down and read about "make do with something."
Buying a House

Is "Steps in buying a house" a good thesis