Skerr is an interjection used primarily to express surprise, excitement, or confusion in response to many things. It may be used when one says something out of the ordinary, when one notices a bum talking to himself, or when an ugly girl sitting across from you in homeroom winks at you.

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)