1832, originally in reference to a 15c.-16c. architectural style with wavy, flame-like curves, from French flamboyant "flaming, wavy," present participle of flamboyer "to flame," from Old French flamboiier "to flame, flare, blaze, glow, shine" (12c.), from flambe "a flame, flame of love," from flamble, variant of flamme, from Latin flammula "little flame," diminutive of flamma "flame, blazing fire" (from PIE root *bhel- (1) "to shine, flash, burn"). Extended sense of "showy, ornate" is from 1879. Related: Flamboyantly.
late 14c., "cause to contract or be wrinkled or wavy." Old English had gecrympan "to crimp, curl," but the modern word probably is from Middle Dutch or Low German crimpen/krimpen "to shrink, crimp." Sense of "bend back or inward, draw together" is from 1712. Related: Crimped; crimping.
"very small wave," 1798, from earlier meaning "stretch of shallow, rippling water" (1755), from ripple (v.). The meaning "light ruffling of the surface suggestive of a ripple" is from 1843.
The meaning "ice cream streaked with colored syrup" is attested by 1939, so called from its appearance. In reference to the ripple-rings in water from a cast stone, by 1884. (Chaucer, late 14c., used roundel "a little circle" for that.) As the name of a brand of inexpensive wine sold by E&J Gallo Winery, from 1960 to 1984. In geology, ripple-mark "wavy surface on sand formed by wind or water" is by 1833. Ripple effect "continuous spreading results of an event or action" is from 1950.
Old English crisp "curly, crimped, wavy" (of hair, wool, etc.) from Latin crispus "curled, wrinkled, having curly hair," from PIE root *sker- (2) "to turn, bend."
It began to mean "brittle" 1520s, for obscure reasons, perhaps based on what happens to flat things when they are cooked. Sense of "neat, brisk, having a fresh appearance" (1814) is perhaps a figurative use, or perhaps a separate word. Of air, "chill, bracing" by 1869.
As a noun from mid-14c., originally the name of a light, crinkly material formerly used for kerchiefs, veils, etc.; late 14c. as a kind of pastry. By 1826 as "overdone piece of anything cooked" (as in burned to a crisp). Potato crisps (now the British version of U.S. potato chips, but not originally exclusively British) is by 1897; as simply crisps by 1935. In U.S., crisps began to be used by 1903 in trade names of breakfast cereals. Related: Crisply; crispness.