I found the transcript of the soap and have pasted it below. The term appears also a few times on google (but often on pdf format) but not being a native speaker, I could not figure out its meaning and leave it to the native speakers. I would assume it means a tough business person both male and female but I am not sure.
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I'm not interested in a deal. Stefano programmed me to be a killer, but I haven't killed anyone. I'm not a killer."
"You're a boardroom killer," says Marlena.
2. Women all over world agree that
black leather handbags go with just about everything. They can be used to create the high-powered boardroom killer look along with the chic fashionista look among other styles. For less than glamorous occasions, a woman could choose a large tote that will hold everything she needs from toiletries to breakfast cereal.
3. Much like the weekly Series next Fall, Carolyn and her network of experts provide career and financial advice, as well as discussing a myriad of lifestyle topics that busy working women face every Holiday Season. Typecast as the “boardroom killer” on Trumps Emmy Award Winning Reality Series, Carolyn’s excited to show the world the REAL Carolyn Kepcher, and so is Executive Producer Ron Secreto, in fact he’s banking on it.