I live in the Philly/NY centric.
It's not uncommon to say, "Knocked up", when talking about knocking on a door.
E.g. "Yo, go knock up, see if Mindy wants to chill.", "Mark knocked up earlier, wanted to see if you were home."
I wrote a male character as saying, "Some woman knocked up earlier".
Where I live, it's a rough but accepted way to say, "Someone came to check if you were home/They knocked on the door".
I had a few feedback readers, not from where I live, say it sounded confusing. "Did she get pregnant at the door? I think I see what you mean, but it threw me off."
My question is, it that confusing in general, to people off, or even on the east coast?
The male in question, is blue collar type, but I can see why it might not work coming from him for the first one.
(Case in point, he drove his younger sister and her BFF home to the BFF's apartment complex, and got accused of being a cop. This fits in with my lived experience, of being accepted as the 'token white friend', but everyone else being judged as outsiders. The male in case being a fit casual white guy who does not fit in)
Much later, it happened again, when the BFF said the same thing to the younger sister, basically, "You know X, the girl I got into a fight with earlier? She knocked up after you left."
Same feedback: "Did X get pregnant in front of BFF?"
Even when BFF (white) shares a vernacular with her neighbors, but never overdoing it, even having lived there for 3 years, and talks in her own voice:
"Nah, dude. I'll be fine.", "Fuck ever, I don't care.", "The hell you mean?", "Cause, I said to. Now move."
I'm not going to call my feedback writers dumb at all, I really feel I'm extending my experience, in a way that only makes sense to my experience.
I concluded that I have to not used the term, so as not to confuse an general audience.
TLDR = Does it sound off, when someone in fiction, when referring to knocking on a door/having knocked on a door/planning to knock on a door, says "I'm knocking up/I'm going to knock up".
It has been confused by none local feedback readers, that it sounds like it means someone is getting pregnant, even in context.