What's the word I'm thinking of? Today, it's....
CURWHIBBLE [KUR-wib-ul] (noun)A thingamajig or whatchmacallit
"Many thanks to your honor. What pretty curwhibbles and etceteras! I'll hang 'em to my watch to give it a travelled air."
--Anonymous, "A Captivity among the Rockites," in The Metropolitan (1831) (TWITO, page 37)