The Vietnamese word "bập bềnh" is primarily used as a verb that describes a gentle bobbing or swaying motion, often associated with boats or other objects floating on water. When something is "bập bềnh," it moves up and down or back and forth in a light, rhythmic manner.
While "bập bềnh" primarily refers to bobbing or swaying motions, it may also suggest a carefree or playful attitude, similar to how one might feel when floating on water without worries.