Lower middle class. Parents divorced and in lieu of child support, my mom got the equity in the house. That's fine on paper, but in day to day living, we struggled. Always good times going to the store for ketchup and pulling out your food stamps.
We were pretty solidly middle class until my step-father and mother divorced. My mother got the house but we scratched by from then on. The house payment was the biggest problem. We had basically no other expenses other than that... no cable, one basic phone which it was death to call long distance on, no need for heater, no ac in SoCal, turn off all the lights, public school, etc. But damn the house payment was a burden. I remember my mom saying more than a few times that she had wished she gave up the house. Later it ended up helping her in that she sold it and was able to buy a small townhome which keeps her monthly costs low. My mother has never really got out of the scratching by mode though.
You get real inventive on what you eat when you have to make do with whatever is left in the fridge and pantry and things don't exactly 'match'. I got use to eating a lot of oddball combo's as a kid and that carried on through when I was a bachelor. My now wife would make fun of my odd eating habits which most are gone now but when I am hungry and we haven't been shopping in a while- instead of going to the store I will put together one of my crazy poor meals. Pretty much if I have some tortillas and ranch dressing I can figure out something to put in them.