lacking, underwhelming, disappointing
(originally from Yiddish)
Man 1: Hey it's November or December or January!
Man 2: You know what that means...
Man 1: Hanukkah, of course!
Man 2: Have you had latkes this year?
Man 1: My mother-in-law made some.
Man 2: And?
Man 1: They were shvach.
Man 2: That's too bad. You want some sufganiot?
Man 1: No. Those are too fattening.