Portmanteau of "cash" and "astigmatism". The ailment of being rendered either short-sighted or blind due to dollar signs in the eyes. A level of greed that results in a person behaving without thought to future consequences. First used in Jeph Jacques' webcomic "Questionable Content".
Faye: I only have to pay a third of the rent instead of half! There are dollar signs dancing in my eyes!
Dora: Careful, our eye-care plan doesn't cover cashtigmatism.
Did you hear? John inherited a bunch of money from his uncle, but it gave him cashtigmatism and he blew it all on silly putty and gummi bears.