Being in a general bad mood, but the spectrum is wide. It can be from simple disappointment or waking up on the wrong side of the bed to utter nihilism and existential angst for the human race, and everything in between. Possibly of Yiddish origin. One who is shtoompy is usually called a shtoomp.

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