Crispies, also called smokers are last-stage zombies who have burned up. There are two subtypes but they are nearly indistinguishable. One is a human who has burned and turned, the other is a zombie which has been burned up and is still moving around. (See flamers.)
The level of threat posed by crispies is directly proportional to how badly they have been burned. Lightly burned zombies might even be called toasties. The point here though is that the burning of flesh tends to shorten tendons and muscles leaving curled hands, feet or limbs. This makes it much harder for the zombie to remain mobile or to grab hold of it’s victims. The zombie I’ve illustrated above got away from the flames with her hands in tact so there is still some threat posed there. She’s lucky too in that she is still able to shuffle about a bit. But no matter what, the end is near for this little lady.