Miss Snark, a pseudonymous literary agent, has some purported excerpts from Asimov's slushpile. Because the excerpts are limited to sentences, they pretty much have to fall under #4 on the Slushkiller list to be worth quoting, but I actually have a small fondness for
"Something must have happened, since it's not like her to come back naked and not aware of anything."
As well as
Onion oil! I couldn't imagine anyting worse than a daily bath in onion oil.
However, I rather suspect that the stories I'm imagining to go with those sentences aren't the ones that they were submitted with.