swot

His tormentors realised that he was not a mere "swot," that he had fists and knew how to use them.

But Sir Toady Lion says he isn't going to have any—being married is ever such a swot, and children are all little pigs.

However, as I never do much else I'm able to swot the French all right.

I told 'em to keep my fire in—I'm going to swot like blazes to-night.

Swot is, as the querist supposes, a military cant term, and a sufficiently vulgar one too.