This tag should really see use more often. It comes up in so many different doujins

Intercrural is another term for it. I do agree that thighjob might be better, but whatever the name this is a good tag.

wet humping

good description but thighjob is the more common term, although i suppose the terms here need to be japanese

Outercourse, usually thighs or other non penetrative grinding.

I agree with dark3ye, but a better one would just be "thighjob".