The stringy mushroom is when some bitch (or dude if you swing that way) sneezes on your dick wile giving a blow job, and when she pulls away snot hangs off of the dick like gooey strings hanging off of a mushroom.

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)