quake-buttock

quake-buttock (plural quake-buttocks)

1. (obsolete, rare) Alternative form of quakebuttock
   • c. 1613, Thomas Middleton; William Rowley, “Wit at Several Weapons. A Comedy.”, in Fifty Comedies and Tragedies. […], [part 1], London: Printed by J[ohn] Macock [and H. Hills], for John Martyn, Henry Herringman, and Richard Marriot, published 1679, OCLC 1015511273, Act I, scene i, page 358:

     See what theſe times are grown to, before twenty / I ruſh'd into the world, which is indeed / Much like the Art of ſwiming, he that will attain to't / Muſt fall plump, and duck himſelf at firſt, / And that will make him hardy and advent'rous, / And not ſtand putting in one foot, and ſhiver, / And then draw t'other after, like a quake-buttock; […]