This is a spin-off from another thread....
Skipping lessons or entire days of school was 'bunking off' where I grew up - which was Sarf London.
There's an Arctic Monkeys song in which Alex mentions 'she wagged English and Science', which I checked with a friend from Sheffield, and it means what I thought it meant.
I think you could make a map of the UK by plotting regional slang for skipping lessons.