A ‘Christian Turk’ is a phrase used to explain a highly unlikely event occurring – for instance that of someone born in Turkey being Christian.
Since up to 98 percent of the population are Muslims, Christians are obviously a minority religion in Turkey. Because it is a secular country, the only Muslim country in the world that has no state religion, the Constitution guarantees religious freedom, and tolerance is the rule. The population includes members of the Armenian Apostolic and Greek Orthodox churches, Roman and Eastern Catholics, and Jews. Today, approximately 120,000 Christians and 26,000 Jews live in Turkey, out of 73 million of the total population.
In western culture the phrase Christian Turk is used when you know the chances of something happening are slim.
For instance: 1) Winning the Lottery, 2) Hitting a Bulls Eye in Darts, 3) Scoring 3 points in Basketball for an amateur.
There is a 0.1% chance of being a Christian in Turkey, hence if you won the lottery you would be called a Christian Turk.
Person 1: Has he got a round of drinks in yet?
Person 2: Of course not, fat chance of that happening - he's like a Christian Turk!