What's the word I'm thinking of? Today, it's...
RANTIPOLE [RAN-ti-pohl] (noun, adjective or verb)
A wild, reckless person
"This rantipole hero had for some time singled out the blooming Katrina for the object of his uncouth gallantries, and though his amorous toyings were something like the gentle caresses and endearments of a bear, yet it was whispered that she did not altogether discourage his hopes."
--Washington Irving, "The Legend of Sleepy Hollow" (1820) (TWITO, page 122)