In the Air force, or in airplanes, what does waxing his tail mean. This was in he right stuff by tom wolf?

In the right stuff, by tom wolf, he goes into saying that hassling and dog-Fighting in the air was forbidden, and then he goes into that people did it anyway. This is a quoe from te book "The winner of the dog-fight, ( the pilot who could slip beind the other one and get locked o to his tail)-wax his tail."
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