p/k is prekill
f/t is frozen/thawed
cervical dislocation is when you, in short, break the mouses neck killing it instantly (it's instant if done right, botching the process can be traumitizing) I do this by placing a stick (usually my feeding tongs) behind the neck and pulling back on the tail, this disconects the spine from the skull.
So I p/k by cervical dislocation before feeding, if I freeze them first then thaw and feed they're f/t.
Any other Q's? It's okay to ask I was completely lost for a while when I started.
You may also want to check out this: http://ball-pythons.net/forums/showthread.php?t=69059
It's a list of the common abbreviations used in the herp comunity.