fartlek (FART-lek) noun
A method of training, originally developed for runners, that involves intense activity interspersed with low effort. For example, sprinting and walking.
[From Swedish fart (speed) + lek (play).]
The Swedish word for “speed” is “fart”? Seriously? Then movie marquees must’ve looked awfully funny in 1994. I’ll never look at my Speed DVD the same way again.