Someone you really don't like, and you don't know how else to say it or express how much you dislike them, so you say to them jou ma se ewige slegte poes
Me: "Check this ewige slegte poes"
Them: "(áá£á)Õ"
A poesface is someone who is a poes but you want to tune him/her something worse than a poes, like a poesface.
*Gets dropshot in COD* Me - "Check this poesface dropshotting with a shotgun."