A+

"a plus", short for "a plus tard" (French, pronounced ah-plu-tar), that is "see you later".
Used to end an informal email, or a chat. Equivalent to "C U"
http://www.urbandictionary.com/zazzle.products.php?defid=1461004

You can listen to the pronunciation here: http://www.forvo.com/word/a_plus_tard/