a family friendly term for WTF/WTH, usually used when something surprising or strange happens. Is also used in the same context as most "what the..." phrases.

Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed

Used for when something unexpected or stupid happens, used like what the hell.

similar to wtf. orignally used in the beginning of a sean kingston song.