Inertia of the mouth. The inability to stop talking once one has started, often including the verbertia itself in the torrent of words. Could also apply to the inability to *start* talking again once you've stopped (usually while taking a dramatic pause during a speech).

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