When you're spooning with your boo and you accidentally pass wind. This usually happens when the partner's knees are tucked up tight to yours and your body is in already in the full bowel movement position. You feign sleep/suppress laughter when they react.

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