I do not know what this term means, but Oriana Fallaci and Luboš Motl are Christian atheists.
For example, Oriana Fallaci writes (
phibetacons.nationalreview.com/post/?q=MGY5ZDJkZWQ2MzRjMmNmNzcwNzg5MjQ5NDgyYmU2YWE=):
In addition to call herself a “Christian”, Oriana Fallaci is also an atheist too; she does not believe in God.
Luboš Motl writes (
motls.blogspot.com/2006/09/oriana-fallaci-force-of-reason.html):
So do “Christian atheists” have the gift of eternal life, and do they go to heaven? How can one be a Christian and an atheist. If one has to believe that Jesus is God to be a Christian, how can an atheist also be “Christian” since they do not believe in any God, much less the notion that Christ is God.