A form of hook shot where the basketball is released from a shooter's hand at the peak of the arc. It's a difficult shot to master, but it's considered one of the deadliest shots in basketball because of the difficulty in defending it.
Kareem Abdul-Jabbar, NBA all-time scoring leader, practically trademarked the sky hook since it was often his go to shot. If defenders overplayed the hook shot, he would spin and shoot the jumper.