To watch a film/Tv programme while talking to a friend who is watching the exact same thing at the exact same time, in a completely different place. This can include television, DVD's or online movies. It is common to use communication devices such as MSN, a telephone or FB chat.
Sync Watching results in you repeating every funny line in the movie or tv programme to your mate and therefore enjoying it, synchronized.

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)