He’s referencing the stabbing given to him by his son’s mother, Angela.. “I felt so alone, I had a crew, but so what? Then when Angela Stabbed me, guess who showed up?” (Bar from “Calm Down” off Joe Budden’s self titled debut)
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Its a double entendre. He’s also trying to say that himself and the rest of Slaughterhouse are very deep with their lyrics, deeper than the stab wound. They put everything in the open and go hard on every track they release.