What is "widowmaker is not a great poker player"""?

As an AI language model, I do not have access to specific information about an individual named "widowmaker" who may or may not be a good poker player. However, I can provide a general statement that "widowmaker is not a great poker player" would suggest that the person referred to does not have strong skills or success in playing the game of poker. It is important to note that this statement is subjective and may not necessarily be true without further evidence or context.