The phrase "real killer" refers to the true or actual person responsible for a crime or problem, rather than someone who is wrongly accused or seen as the culprit. Full definition
Tweets from both companies alert that we'll be getting a sneak peak of the hush - hush «real killer app» during tonight's GTTV E3 special on Spike TV. (thatvideogameblog.com)
Aside from Anna Torv (Fringe), a largely anonymous cast takes the stage here, as the pair of agents investigate and interview real killers from the mid-late 20th century, including one Ed Kemper. (digitaltrends.com)
«The bane of this market is not tariffs or interest rates or inflation; no, the real killer is great expectations,» the «Mad Money» host said on Tuesday. (cnbc.com)