A swainbank is a widely recognised standard weight around the cumbrian area (especially keswick)
It amounts to approximately 10 stone wet through. A swainbank may be used in multiples and with additional fractions of a swainbank to give accurate measurement.
A male math teacher that is so hot that even his straight male students will come in after school for some extra credit. The name is a combination of the words "sweat" and "pain", two things that his students will definitely experience.
Student A: Man, wasn't that math test that we just had so difficult?
Student B: Yeah, the last time I did something that hard in a math classroom, I was with Mr. Swain.