There is this woman who has such a strong bad odor - she smells of a man who does not use deodorant. It's so shocking and off-putting when I catch her at the stairs... sometimes I gasp and even make a shocked sound in front of her... not caring if she sees me. I kinda even want to show her it's not normal and that I do sense it, I also make a face and put my fingers on my nose clearly showing I am in distress from something I have smelled... Then I have to open the whole building public windows after her.
She is a mid-age woman that looks good, is not poor or sick from what I see. It feels like she just doesn't think she needs deodorant... and at this point doesn't sense her own smell, because her brain is used to it.
So yeah, people who don't look after their body odor and stink up indoor public places - huge pet peeve.