What do the words lousy, strict and stuffing mean in the text

In this context lousy is being used as doing something poorly or badly. The family is doing a poor job at holding their new years resolution.

Strict is being used as stern in a way to not break character. / The father will not break his diet.

Stuffing is used as a way to say eating a lot or eating like a pig. The father was feeding himself like a pig.

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rudy is the nazi ideal, unfortunately for the nazis his ideal comes in the form of jesse the complete opposite of those who embrace the idea of white supremacy. over the course of the novel, rudy learns that he wants nothing to do with the hitler youth, and because of this his parents are forced to make a bargain; rudy's father is forced into the military, so that his son can remain home.   both liesel and hans influence that young man that rudy becomes. following han's example, rudy puts aside his own hunger to risk his life so that the jewish prisoners might have bread to eat.