Greedy, dishonest person who takes advantage of the situation in a financial transaction.
Refers to how Jacob in the old testament cheated his brother out of his birthrights.
Derogatory about rich jews who got their riches by cheating others.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.