on (one’s) bicycle adj. in boxing, constantly moving around a ring (to avoid an opponent). (source: Double-Tongued Dictionary)
Further reading
Have you lived in your home so long that you don’t notice its flaws? In Sweden, they have a name for this condition: It’s hemmablind—literally, “home blind.” A popular Swedish TV program shows what you can do about it. Plus, unlocking the mysterious...
For at least three centuries, declaring I’ll eat my hat! has indicated that the speaker is so certain they’re right, that if they’re not, they’re willing to swallow their chapeau. Variations of this phrase include I’ll eat my boots, I’ll eat my cap...