meaning definitly, of course. its gonna come out to be a good thing. positive.

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)

Great brand of tactical flashlights, often featured on CSI and used by the armed forces in Iraq.

Surefire, most commonly used as "Surefire Way" is a word with similar meanings to efficient, or effective, although can have a negative connotation as well as a positive one.