The Many Names of Linux Kernels
dartttt writes "Not many people know that Kernel releases have their codenames. Most of the Linux 2.6 and 3.x kernels include a name in the Makefile of their source trees, which can be found in the git repository. They are not publicized as such but some of them are really hilarious."
http://en.wikipedia.org/wiki/List_of_Linux_kernel_names is the link worth going to if you want to find out what they are.
NAME = "Divemaster Edition"
NAME = Sneaky Weasel
NAME = Flesh-Eating Bats with Fangs
NAME = Sheep on Meth
NAME = Man-Eating Seals of Antiquity
NAME = Vindictive Armadillo
NAME = Temporary Tasmanian Devil
NAME = Erotic Pickled Herring
NAME = Killer Bat of Doom
NAME = Rotary Wombat
NAME = Funky Weasel is Jiggy wit it
NAME = Arr Matey! A Hairy Bilge Rat!
NAME = Pink Farting Weasel
NAME = Holy Dancing Manatees, Batman!
NAME = Nocturnal Monster Puppy
NAME = Homicidal Dwarf Hamster