Captain Slock Share definition Flag It's in reference to Caps Lock. Cap. Slock, or Captain Slock. Some say he's a pirate but that has yet to be proven. DO YOU DOUBT ME AND THE POWER OF CAPTAIN SLOCK?!? Captain Slock by Lawlieter December 11, 2009 0 0 Get merch Get the Captain Slock mug. Buy Now — $32.95 See more merch