Obs. exc. dial. [Onomatopœic: cf. wag, swag. Some dialects have also quaggle corresp. to waggle.] intr. To shake; said of something soft or flabby.
1611. Cotgr., Brimbaler,… to shake, swag, or quag, as a great dug, or th’ vnsound flesh of a foggie person.
1616–61. Holyday, Persius, 337. That To him a strutting panch may quagge with fat.
1623. trans. Favine’s Theat. Hon., V. i. 35. The earth being uncertaine and quagging.
1881. Blackmore, Christowell, xlviii. Many a poor head will ache, and many a poor belly quag, if it is so bad as they tell me.
