What does it mean to have arup payos? What specific style or length is this? Who would have the minhag to keep their payos in such a fashion that is called "arup"?
There is an interesting Wikipedia article describing different payot styles.
"As Yishai mentioned, above, "aruf" means "up" so this refers to payot that are behind the ear vs. hanging down. It could be either tied up and put under the kippah or curled around the ear. According to the wiki article this is considered the common "Litvish" / yeshivish style. That may explain why you have seen this on the shidduch web site.