The act of trying to repeat a fart-like sound (such as scraping a chair leg on the ground, or the air escaping from a cushion as you sit on it) so that others around you know that it wasn't actually you flatulating. This very rarely works.

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