Summary: We argue that cosmic censorship is violated in the collision of two black holes in high spacetime dimension \(D\) when the initial total angular momentum is sufficiently large. The two black holes merge and form an unstable bar-like horizon, which grows a neck in its middle that pinches down with diverging curvature. When \(D\) is large, the emission of gravitational radiation is strongly suppressed and cannot spin down the system to a stable rotating black hole before the neck grows. The phenomenon is demonstrated using simple numerical simulations of the effective theory in the \( 1/D \) expansion. We propose that, even though cosmic censorship is violated, the loss of predictability is small independently of \(D\).