"Deal breakers" are those behaviors or conditions that one partner is unable or unwilling to tolerate in a relationship. Because "tolerance" is a relative term and subject to everyone's unique capacity to accept varying degrees of distress or discomfort, there is no generic, one-size-fits-all answer to this question.
Intriguingly, people don't lie and cheat indiscriminately -- simply because they can get away with it. Even when there is no chance of being found out, people show some level of aversion to acting unethically. They want it both ways: to profit by dishonesty, but also to preserve some sense of themselves as moral beings.
In the 1979 melodrama, 'Hardcore,' starring George C. Scott, writer-director Paul Schrader was less than subtle when he gave his villain the name Ratan, which rhymes with Satan. In my scenario, the man who told me his name was Larry was really Barry. He also failed to mention that he had a wife, who I will give the name Carrie, just to keep it phonetic.