The phrase "rips up and down" typically refers to a tearing or shredding motion. Its antonyms are words that denote smooth or steady movements. Some possible antonyms of "rips up and down" are "floats," "drifts," "glides," "slides," "coasts," "sails," "cruises," and "wafts." These words suggest a lack of resistance or friction, creating a sense of ease, peacefulness, or gracefulness. For example, a boat can sail smoothly on calm waters or drift alongside a lazy river, contrasting with the tumultuous and violent motion of ripping up and down. By using antonyms, writers can express different tones and moods, such as calmness, relaxation, or serenity.