This is one of my new favorite words. I love learning new slang expressions, especially if they aren’t American English. It sounds so pompous when I use them in my head in a fake accent; I can’t help but laugh.
Swot, n.
British Slang
1. A student who studies assiduously, especially to the exclusion of other activities or interests
2. Grind
Possible example: “Your sister’s a right swot, what?”
WildlyRead 
When I hear "swot", I think strategic planning, as in "swot analysis": evaluating strengths, weaknesses, opportunities, threats. But, hey, I'm a management geek.
Alison, that's better than me, who thinks of a "swot" across the behind (and yes, I know it's "swat," but there's that regional accent for you!).