Blood Meridian, definitely, but also a couple of Roald Dahl ones, not including Tales of the Unexpected, specifically, it's about the ones geared towards kids:
1.) The Witches has chapter in it where the Grand High Witch is having a board meeting with England's MISERABLE, STUPID VITCHES, and one of the STUPID VITCHES opens her gob, and questions how they can wipe out all the kids in England. Not sure why GHW can't be arsed with the whole of Great Britain, but er, maybe she was going to move on to Wales next, as I think the hotel they were at was somewhere in the South, but getting off-track, she gets burned to death with, I quote, "Sparks that burrow into her", and the narrator/boy is hiding the entire time, and describes what he saw.
And 2.) The Twits. To cut to the chase, ugly, grimy fuckers, Mr and Mrs Twit have been training a family of monkeys to stand on their heads, and they get their own back by gluing everything in the house onto the ceiling, in its exact same place, so it's "mirrored." As the couple walk in, a bird "shits" on their heads, but... it's *glue*, and, thinking they're upside down, they stand on their heads, and get stuck. They're stuck for so long, that their neck muscles give way and collapse, and they start shrinking into their bodies, until they definitely die. The postman comes 'round, realises they're gone for good, and rejoices. It can be assumed 100% that the neighbourhood rejoices, also, especially since they abused animals, bought guns to shoot at pets, twittery birds that live in trees, and Mr Twit even tried to murder and eat three boys who got stuck in his tree, because he wanted Bird Pie, but there weren't any, so he decided to settle for Boy Pie. They escaped, so you know.