The phrase "rides on knee" refers to the act of a child sitting on an adult's lap while being lifted up and down, usually accompanied by playful movements or bouncing. Some other synonyms for this term include "horsey ride," "bouncing baby," "lap bounce," "knee gallop," and "knee ride." These phrases are often used interchangeably to describe a similar activity that parents or guardians engage in with young children to provide them with entertainment, exercise, and physical stimulation. Engaging in these types of activities can also help to strengthen the parent-child bond and promote a sense of trust and safety between the two individuals.