What posters on a message boards will sometimes say in response to a thread/topic that will eventually be locked/closed. This is a way to show that the thread is incredibly dumb or goes against the rules of the message board. Used to sometimes get in a free post to raise one's post count before the topic gets locked, preventing any further posting in it.

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