Recently the group I ride with has included more fixie riders than I'm used to, and there's a phrase which was initially puzzling but makes perfect sense: the 24-inch gear. I've hidden the meaning under a spoiler so readers get the experience I did.
24 inches is two feet, i.e. walking. (we have lots of hills, some quite steep)
I think we're all familiar with the term "gear inches" to describe the equivalent diameter of a directly driven wheel - this question is specifically about the 24" gear (not low gears in general as you'll see if you look at the spoiler).
Other experienced riders, including those with fixed-gear experience hadn't come across it, and it doesn't seem common on the web (most hits are UK long-distance riders like the ones I ride with, but there are lots of sales of bikes with gears and 24" frames to bury the hits). Is this a universal term, or localised?