The following are all the justifications for meat eating I can think of, all of which my rational self has debunked.
Animals are stupid
Does this mean we can eat new born babies whom are all stupid? Does this mean it is acceptable to eat retarded people?
Most people think it is morally acceptable to eat animals.
Just because most people think something, doesn't mean it's correct (although this in itself is debatable). After all, slavery used to be widely accepted before republicans put a halt to it.
We need meat to survive.
Human beings are evolved to be omnivores. It is natural for us to eat meat.
A lot of things are natural. Genetically, male are prone to be violent, however, this does not justify violent behaviour.
Animals eat animals.
Animals kill animals. Does this make murder right? To compare the morality of a human to that of a vulture is hardly a good argument.
In conclusion, I guess the reason I eat meat is because it tastes good and I really, to put it bluntly, do not care about animals.