Bouncing, explained

From the Oxford English dictionary:

That bounces: in various senses of the verb relating alike to loudness, brag, and vigorous or ungainly movement. Often also (like ‘thumping, whacking, whopping, strapping’, and other words meaning vigorous striking) used with the sense of ‘big’, esp. ‘big rather than elegant or graceful’. bouncing putty: a soft elastic silicone polymer (see quot. 1950).
(In many of the quotations the exact shade of meaning is doubtful.)
1579 S PENSER Sheph. Cal. Aug. 61, I saw the bouncing Bellibone. 1588 Marprel. Epist. (Arb.) 34 Can they not be satisfied with the blessing of this braue bounsing priest? 1602 Return from Parnass. IV. i. (Arb.) 50, I am well prouided of three bounsing wenches. 1606 J. R AYNOLDS Dolarny's Prim. (1880) 97 The bounsing Doa, vnto the brakes did come. 1611 Coryat's Crudities Pref. Verses, Oh for a bonny blith and bounsing ballet To praise this Odcomb'd Chanticleere. 1662 F ULLER Worthies (1840) 363 His mother..lay down her burthen at Elmeby..where this bouncing babe Bonner was born. 1736 H. W ALPOLE Corr. (1820) I. 8 A bouncing head of, I believe, Cleopatra. 1743 MRS . D ELANY Autobiog. & Corr. (1861) II. 237 [She] is as bouncing as ever, and as loud. 1773 G OLDSM . Stoops to Conq. 111, I never saw such a bouncing swaggering puppy since I was born. 1807 T. J EFFERSON Writ. (1830) IV. 101 The bouncing letter he published, and the insolent one he wrote to me. 1813 W AUGH Let. in Mem. v. (1839) 310 An inexperienced, bouncing but well-disposed young woman. 1837 J. D. L ANG New S. Wales II. 378 It has even given birth to a school of oratory in the colony{em} the bouncing school, it may be styled. 1841 MRS . M OZLEY Fairy Bower iv, She was..bold Belle, and bouncing Belle, and every thing but bonny Belle. 1847 B ARHAM Ingol. Leg., St. Cuthb., Stephen de Hoaques..had told all the party a great bouncing lie. 1944 J. G. E. WRIGHT U.S. Patent 2,541,851 (1951), Novel compositions which because of their unusual properties may best be described as ‘bouncing putties’. 1950 Jrnl. Brit. Interplan. Soc. IX. 56 Another contribution by General Electric is ‘bouncing putty’, a viscous and highly resilient silicon material previously used as a core for golf balls. The idea is that certain delicate equipment is buried in the material and shocks thereby distributed evenly over the entire surface of the instruments.

Hence {sm} bouncingly adv., boastfully, blusteringly.
a1677 B ARROW Pope's Suprem. (L.) Pighius said, bouncingly, the judgement of the apostolical see..is far more certain.