White Trash Welfare Check
Opening the oven to check if there are any pots, pans, and/or Tupperware left inside before using it to cook. This is a reference to the common practice among European-Heritage Americans living below the poverty line to use the oven as a storage place when not in use.
I had to do a White Trash Welfare check so my MeeMaw didn't burn the house down like Mama did preheating that oven full of Tupperwares back in '82.