A threat indicated by the raising of one eyebrow while lowering the other, tilting the head, and staring into the eyes of an opponent. Made famous by Dwayne Johnson, better known as "The Rock".

Indicates that the targeted opponent needs to know his/her role and shut his/her mouth.

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