Why: In "For Your Consideration," Callie's character says:
I didn't want your life. I didn't wanna be in a kitchen with the brisket or the fish balls or the kreplach or the kugel or go out with boys that turn into men I don't want to marry. It was all fershteit. I am not you, Mama. I am me, Rachel Pischer. And, oh, yes, I did meet a nice fella. Her name is Mary Pat.Answer: It means something like "understood" - like all those things were taken for granted. I found a few pages that translate farshstaist as "You understand?" or "Got it?" (but the captions on the movie transliterate it with an e).
Source: Bubby Gram
The More You Know: Kugel is a sweetpudding-type casserole. Kosher-for-Passover kugel was just about the only thing that consoled me when I couldn't eat Cadbury Creme Eggs the week after Easter (the only time they are ever around).