What's a phrase you misinterpreted the meaning of for the longest time?

https://discuss.tchncs.de/post/29155606

What's a phrase you misinterpreted the meaning of for the longest time? - tchncs

I’ve seen people using “that’s what she said” in a very serious setting, as a way to say “good point/touché”. They had no idea it was from the Office.

Growing up I always wrote off “it’s always in the last place you look” as just another random thing adults loved to just say all the time.

So is that phrase a joke? I see people talk about how dumb/obvious it is, but I always thought it meant “it’s always in the last place you [would have thought to] look”, as in a ridiculous place you’d never consider.

However my whole family is ADHD and used to setting things in dumb spots you’d never check.

I never really got it for the same reason. Not sure if my parents misworded it, or if I misinterpreted.