To thrash, to beat up, to batter, to clobber. Expressive, aggressive verb that means to severely beat someone up, typically with fists, feet, or an object, inflicting significant physical pain (его вчера знатно отдубасили за баром — “he got thoroughly thrashed behind the bar yesterday”).
На второй песне группы «День и ночь» между сценой и лавками началась драка. Несколько гопников отдубасили волосатого чувака.
During the second song of the group “Day and Night” a fight erupted between the scene and the benches. A few punks were roughing up a hairy bloke.
(Владимир Козлов, Лето девять один)
