a lamb/lambs to the slaughter
like a lamb to (the) slaughter
Without concern for what is to come (because one does not foresee the trouble ahead). This phrase comes from the Bible. When I did business with Michael, I was like a lamb to the slaughter—I had no idea he was such a criminal mastermind. The poor kid and his defense team weren't aware of what the prosecution had in store—it was like lambs to slaughter the moment the trial began.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
(like) a lamb/lambs to the ˈslaughter(do something or go somewhere) without protesting, probably because you do not realize that you are in danger: When the war started, thousands of young men went off to fight, like lambs to the slaughter.
Slaughter is the killing of animals for their meat.
Farlex Partner Idioms Dictionary © Farlex 2017