If you're a vegetarian, and you accidently ate chicken, what will happen to you?

I would just feel bad...
I chose to be a vegetarian it's not like i'm allergic.. Most people are not allergic to meat so it want matter as much or else Probably die or need shots..

The most important is how you feeling.
If you feel good, you can try it again.
If you are hate it, you can go to the church to confess to God.
I think nothing will happen.

lol, loving the anger on some of the comments, basically nothing will happen. If you've vegetarian for a long time (several years) then you may feel a littel nausea and possilby throw up but that is only ONLY because your body is not used to eating meat. Babies throw up a lot for this very reason, it takes a while for their body to adjust to new foods. You won't suffer any health issues nor will it affect your body in any kind of harmful way.
Oh and people who say vegetarians are weak might want to consider other vegetarians such as Mac Danzig (US Mixed martial arts fighter who’s been crowned the Ultimate Fighter, King of the Cage, Gladiator Challenge Champion and Extreme Challenge Trials 2001 U.S. MMA National Champion).