My blogsite was 1st page in google search. but its gone after adding a <meta description> on it!! so when it will be came back again???
Maybe the keyword density is too High? Make sure you didn't do anything wrong. If everything is OK I believe it just a matter of time that your blog will "come back again".
wait for some more time ; if it does not return remove the meta and see if it returns;if it still doesnt submit your blog posts to some more social sites and see if results return normal.
Care to post the code you put in? Don't use exact keywords ( something like x,y,z will do) A couple of other questions. How old is it? How long was it ranking for this keyword, and does it still rank normally for other keywords?
I've same experiences like you.. After I add meta tags, my blog is miss from google.. But after one week, it's appear again.. But I prefer not using meta tags...