ドカっとMeaningsAdverb1. thuddingly; plumping down (like a heavy weight) (Onomatopoeia)Other readingsどかっとドカッとExamples2外がい国こく製せい品ひんがどかっと市し場じょうに出で回まわった。Foreign products arrived on the market in large quantities.彼かれはいすにどかっと腰こしを下おろした。He sank into a chair.