When a girl is standing up and her back is bent(ass out, head up) and someone opens a can/bottle of root beer, then pours it down her back starting from the bottom of her neck, as another person is at the bottom of her ass with his/her mouth open ready to sip down the root beer.

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