The opposite of a butterface or a girl you would put a paper bag over the face of before intercourse. Potato sacking is necessary with girls who have nice face but less then desirable bodies that need to be covered before oral sex, because head is head.

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)