Something pertaining to the metafilter community, or an activity related to metafilter. Taken from "MEta FIlter." Used descriptively. Expanded to "Mefites" when used to describe members of the metafilter community. May be spelled Mefi or MeFi.

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