As to 'knocked up' that is taken as slang, but it could be cant and could be from much older street language, koine or prakrit.
One never knows.
All my life I have corrected my mother's word for 'hair.' She pronounces it as 'haar' and I always thought it was southern slang. During all this anthropology/archaeology learning I've done over the last few years I've learned that the Old English and Old High German word for hair is HAAR! I don't correct her anymore, lol. (Both sides of my family have English backgrounds)
Re "knocked up" Let's not forget nookie.