Lots of animals. Jaws, cockatoo, peacock, shark, bunny (not related to the 'hawk), spike, dolphin, zebra, and horse. my head has also been referred to as a very dangerous weapon. On several occasions. Its also been used in a dangerous way...most on accident, some not so accidental.
for other things, just play-on-names for my real name(declan) basically, ANYTHING you can come up with declan has been thought up and used as a nickname, i dare you to try but you will only see what i mean.
my first year of wrestling i was called "judo" since i did judo for almost 8 years at the time and i used to kick the crap out of all the first year wrestler until i got moved up, thats when everyone started calling me judo lol.