steamroller /ˈstimˌroʊlɚ/noun 4verb 2forms 3 noun4 •(informal) Any heavy road roller. •(historical) A steam-powered heavy road roller. •(figurative) Any seemingly irresistible force.Well, I'm a steamroller, babe / I'm bound to roll all over you — 1970 •(slang) A pipe, used for smoking cannabis, open at both ends and having a bowl near one end.It's more about him testing his wares. He rolls joints. He doesn't own a bong, hookah, smoking pipe, chillum, vaporizer, scale, dugout system, grinder, or steamroller. — 2005 verb2 •To level a road using a steamroller. •(figurative) To proceed ruthlessly against all opposition as if with an overwhelming force. formssteamrollered · steamrollering · steamrollers