← BackshareGuessobstreperously/əbˈstrɛpərəsli/adverbIn a noisy and unruly manner.He obstreperously argued with the referee, drawing a penalty.The children played obstreperously in the backyard, shouting and laughing.The fans cheered obstreperously after the winning goal.SynonymsloudlyrowdilyAntonymscalmlyquietly