Achilles' heel. (See under Achilles.) I showed him a fair pair of heels. I ran away and outran them.
“Two of them saw me when I went out of doors, and chased me, but I showed them a fair pair of heels.” —SirW.Scott: Peveril of the Peak, chap. xxiv.
Out at heels. In a sad plight, in decayed circumstances, like a beggar whose stockings are worn out at the heels.
“A good man's fortune may grow out at heels.”
Shakespeare: King Lear, ii. 2.
To show a light pair of heels. To abscond. To take to one's heels. To run off. “In pedes nos conjicere.”
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894