verb
To sneak a framed picture of yourself among your friend's cherished photos.

noun
mantling: the act of sneaking a framed picture of yourself among your friend's cherished photos.

past-tense: mantled

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)