Meaning

adjective noisy and lacking in restraint or discipline

adjective full of rough and exuberant animal spirits

adjective violently agitated and turbulent; ; - Ezra Pound

originFrom Middle English boistres, an alteration of Middle English boistous (“crude, unrefined”), of uncertain origin. Likely from Anglo-Norman boystous, bustous (“rough, in a crude state, disabled, paralysed, unable to walk, lame”), Old French boitous (“limping; having a rough, uneven surface”).

Etymology from Wiktionary, CC BY-SA 3.0