Only places I remember seeing that term is awkwardly translated hentai. Even then, I think it might have been done ironically. I can't remember any examples I can link to offhand though.

Are you referring to men rubbing their dick on women's armpits? Like how paizuri is for tits? If so, I'm sorry I don't have anything like that and I don't know the proper term to search for it for an example. Maybe someone else knows the proper search term. I wouldn't be surprised if there were a lot on pixiv though, if only you know how to find it.

On the otherhand, if you're talking about literally having a pussy in her armpit, well the only thing close to that that I think of would be some of Borusen's works. I'm posting an example of that, mostly because I find the idea amusing.