on (one’s) bicycle adj. in boxing, constantly moving around a ring (to avoid an opponent). (source: Double-Tongued Dictionary)
Further reading
Susan from Virginia Beach, Virginia, shares the phrase her mother used when the kids refused to eat: It’ll grow hair on your back teeth. This supposed motivator likely blends two older traditions: a German idiom, Haare auf den Zähnen haben...
Why do speakers of the same language have different accents? A lively new book called Why We Talk Funny offers a linguist’s look at how and why accents develop. And: If you’ve “stood up” at a wedding, were you supporting the marriage or objecting to...