「go for broke」とは、ギャンブルに由来しているフレーズです。「to go for broke」は「大きな成功を得るためにすべてを賭ける」という意味になります。そのため、「全力で立ち向かう」や「最後まで戦う」という意味でも使われています。つまり、自分のことを励ますために使われるケースが多くあります。
（皆さんが英語の発音練習が出来るように、例文を読み上げて、録音しました。録音したファイルは以下にあります。）
I am sure she will say no, but I will go for broke!
彼女は「うん」といわないだろうが、当たってくだろだ！
I think that you should go for broke.
君はいちかばちか賭けてみたほうがいいよ。
Go for broke is a phrase from Hawaiian Pidgin[1] meaning “to wager everything”.
It was the motto of a World War II Japanese-American military unit, the 442nd Infantry Regiment.
Go for broke or going for broke may also mean:
Go For Broke Monument, commemorating Japanese Americans who served in the United States Army during World War II, including the 442nd
Go for Broke! (1951 film), a film about the 442nd
Going for Broke (1977 film), a Danish film
Go for Broke (2002 film), an American film
Going for Broke (2003 film), a television movie
Going for Broke (2015 book)
Going for Broke (album), a 1984 album by Eddy Grant
Go For Broke (game), an unlicensed variant on the game Monopoly