Combination of wtf and omg (thus forming wtfomg), and k, thx, and bye (thus forming kthxbye).

Used in a fashion similar to kthxbye, except with an additional aspect of shock and confusion. Often used sarcastically.

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)