Entry 1 sense Webster, 1913 Rowdy /roud'-ē/ · Row·dy · IPA /ˈɹaʊ̯di/ 01 n. One who engages in rows, or noisy quarrels; a ruffianly fellow. pl. Rowdies ((#)) 1. One who engages in rows, or noisy quarrels; a ruffianly fellow.