Sentence:  Their modest stole, to garish looser weed, / Deck'd with love-favours their late whoredoms' meed: / And where they wont sip of the simple flood, / Now <WSD>toss</WSD> they bowls of Bacchus' boiling blood, 
Meaning of the word marked with <WSD> tags:  To drink in large draughts; to gulp.