What does DOA stand for?
I've seen this in the context of P2Pool stales, specifically here.
Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.Visit Stack Exchange
Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthusiasts. It only takes a minute to sign up.Sign up to join this community
Dead On Arrival. The term is referring to about valid shares your miner discovers that were found too late to be included in the P2Pool internal block chain and therefor aren't paid to the miner. Counter intuitively a DOA share can still be a valid Bitcoin block.