To Sand-Chimp out is when a middle eastern or Pakistani person (usually Muslim), removes his/her façade as a civilized human being and releases his/her Inner Sand Chimp; as in to start shouting about Allah, The Quran, "death to America!!", throwing shoes around and blowing themselves up, Basically to burn flags, behead people and marry a 12 year olds.

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