Can only be performed when it is very cold. A man's ball sac must be cold and pulled up very tightly. A girl then puts the man's balls in her mouth and sucks them until they are warm enough that they become very saggy again. The girl cannot take the balls out of her mouth until they are completely saggy, otherwise it is not a true Siberian Sack Lunch.

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