The term "grand pappies" can be seen as an endearing reference to grandfathers or older men. Some synonyms for this phrase may include "gramps," "pawpaw," "papa," "granddad," or "granddaddy." These terms can vary based on geographical location or personal preference. Other slang terms that may be used to refer to older men include "old-timer," "geezer," or "senior." It is important to note that using these terms can carry different connotations and may not always be appropriate. As with any language, it is important to use respectful language when referring to others, regardless of age.