I know that when I have an associate who I think highly of and is very capable of performing the job (or person for a relationship) [s]he is pursuing, I will want to find the "recruiters" and put a good word in for my friend/associate.
What if I want to make it tough for someone to get a position? I would want to go to those "recruiters" and convince them that my associate sucks and is not cut out for it. I would be dissuading those recruiters. But what word would fit "I would be _ my associate"? Backstabbing doesn't really cut it for me.
The same word would work in this sentence: "I feel my current bosses don't like me, and I'm afraid that they'll __ me to any prospective employer." or this one: "People think that I'm a slob that they would probably __ me to that hot girl I want to pursue."
I'm tempted to make up a word - decommend - the opposite of recommend where the direct object is that poor person you would be putting a bad word in for.