(n.) In Japanese (or, by and large,
Asian) culture, the accomplishment of embracing defeat (and/or
death) with equanimity and dignity.
Literally meaning "composure" or "manliness".
Guy 1: Can you believe it? Mark gambled away his lifetime savings and doesn't even seem to feel
bad about it.
Guy
2: I know, he's a total
fuck-up.
Mark: It's called isagiyosa, guys.