When I was a kid I often heard my father refer to so-and-so "shacking up" with someone. In my mind (as I deduced from his tone of voice that this was a bad thing) that it meant that these people had done something bad and had to go live in one of those squatty little tar paper shacks that I'd see along the side of the road sometimes.
A childhood belief about marriage

others believed things like this
- I used to believe that "Our Father, who art in heaven" meant that God was also a painter on the side. — Amanda
- i used to believe that sex meant love and that having sex meant the two people would live happily ever after.— amy
- whenever i heard a melody, i thought it stuck in my stomach when i heard it in my mindAnon
- I used to think that if a movie was advertised on the side of a bus, that meant it was really good. — Aretia
- I used to believe that house fires were caused by foolish people who put paper on the stove.— C.C.
- I thought that exorcise and exercise both meant the same thing— Dobby Bob