Double delta AE

Could anyone point me to a discussion on what double delta AE is? I can guess but I don't really know.

That could be a reference to "doubling" the amount of AE in a table that has row values based on the "delta" TPS or "delta" MAP value.
I don't have any particular link.

Yes that is what I guess. I am having a lean pop sometimes on mid aggressive throttle application. Shows on wideband also. Trying to figure it out.