Hornswaggle is an alternate spelling of hornswoggle, an archaic word that means to bamboozle or hoodwink. I take my pronunciation from the late Harvey Korman in "Blazing Saddles" --

"I want rustlers, cutthroats, murderers, bounty hunters, desperados, mugs, pugs, thugs, nitwits, halfwits, dimwits, vipers, snipers, conmen, Indian agents, Mexican bandits, muggers, buggerers, bushwhackers, hornswagglers, horse thieves, bull dykes, train robbers, bank robbers, ass kickers, shit kickers and Methodists!"