Some creative ways of saying good morning are saying it in another language, mimicking another accent or using a stereotypical British expression. Practice pronunciation beforehand to ensure a smooth delivery.
A good way to say good morning is to use an easily recognizable foreign language to say it. "Buenos dias" is the Spanish way of saying it and is pronounced boo-e-nos di-as. Alternatively, say "buon giorno" to say good morning in Italian. Pronounce the expression as bon jor-no. The "j" in "jor" makes a similar sound to the "j" in "jar."
Using an exaggerated accent while saying good morning is also a creative way to say it. For instance, mimic a heavy French accent by making a guttural "r" sound, omitting the "g" at the end and pronouncing the "in" in morning as "en." Say it faster than in English to complete the act.
Use a stereotypical British expression to say good morning in a classy and funny way. "Top of the morning to you," is a good example. Likewise, end with British salutations to decorate morning wishes. If talking to a friend, say "good morning mate." If talking to a significant other, say "good morning sweetheart" with the "r" omitted.