Someone who moves very slowly is poky. When you try to take your poky dog on a jog, she'll stop to sniff every bush and blade of grass along the way.
Wasting time, dawdling, or being annoying and boring are all ways to get called poky: "I need a new computer — my poky old laptop takes forever to do anything." In Britain this adjective is sometimes used in a completely opposite way, to mean "speedy" or "quick to accelerate": "Her car is much more poky than it looks!"