This is from kindergarten cop and the best way I have found to assess class background. Plenty of class traitors have contributed to the great idea, so please don't be defensive. Full disclosure my dad was a janitor who previously was in the army (deceased early 2000-ish) and my mom (divorced) was on disability and incarcerated for most of my life.
I wouldn't call my parents fuck ups so muh as wrong place, wrong time. Dad never got a collee degree till he was nearly 30 and worked for his company for a decade before getting a full time job.