roller
n.— «I reined in the speedy pace and tried to find a rhythm over the first three miles, where we encountered “rollers”—in running parlance, those are mellow hills with ups and downs that wake up your legs, but aren’t so challenging that they leave you breathless.» —“Oh deer! Hills and more at the March Madness Half Marathon” by Liz Plosser Time Out Chicago Mar. 16, 2009. (source: Double-Tongued Dictionary)
Further reading
What’s the origin of the phrase a country mile? Vida from Rochester, New York, says her husband often uses it, as in “go about a country mile and then make a left.” The expression goes back at least 300 years in the United Kingdom and has long meant...
Outdoor enthusiasts divide the idea of fun into three categories: Type I fun is guaranteed to be pleasant, like get-togethers with good friends, Type II fun is miserable when you’re having it, but enjoyable in retrospect, and Type III fun is...