The term "bouncing besses" is an informal expression that is used to refer to large breasts that are noticeable when the individual walks or moves. The use of this phrase is not appropriate in formal situations and can be considered disrespectful. However, there are other synonyms that can be used to refer to large breasts in a respectful manner. Some of the common synonyms for "bouncing besses" include bosom, bust, chest, cleavage, and mammary glands. Using these synonyms in the right context is important to avoid any offense or discomfort to others. It is always advisable to be cautious while using words that could be considered sensitive or inappropriate.