Shaking a human being, especially a child, with enough force to cause a blackout is never accidental and constitutes severe physical abuse requiring immediate medical and legal intervention. Disclaimer: This report is for informational purposes only and does not constitute medical or legal advice. If you suspect child abuse or traumatic injury, contact professional emergency services or child protective services immediately.

Based on standard English and industry terminology, this exact phrase is not a recognized technical term, medical condition, or consumer product. The most likely interpretation is that you are referring to one of two distinct concepts: or a "blackout" caused by head trauma (concussion).