I'm pretty sure the parent is right that it's "shit out of luck". I knew it as a military thing, and the internet seems to agree[1]. [1] http://www.etymonline.

I'm pretty sure the parent is right that it's "shit out of luck". I knew it as a military thing, and the internet seems to agree[1]. [1] http://www.etymonline.com/index.php?term=S.O.L http://www.etymonline.com/index.php?term=S.O.L. (one random link)