It is a noun created from the adjective demigrante, which was originally clearly an error of typing by the word denigrating, as seen in the original text which is in an example of the above link. There also mentions migrant etymology, which is an extreme, forced and xenophobic interpretation (at the time perhaps interested) by an association with the unpleasant popular meaning that ended up vulgarly defining the eler ring 'demigrante'.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list
