boke I. \ˈbōk\verb (-ed/-ing/-s) Etymology: Middle English bolken; probably akin to Old English bealcian to belch — more at belch 1.chiefly Scotland: vomit, retch 2.chiefly Scotland: belch, burp II. noun (-s) Etymology: Middle English bolke, from bolken v. 1.chiefly Scotland: retching, vomiting 2.chiefly Scotland: belch, burp