Funny birthday sayings include, "Birthdays are good for your health. Studies show those who have more birthdays live longer" or, "Birthdays are nature’s way of telling us to eat more cake." An additional funny saying is, "Celebrating your birthday is like being happy that you are closer to your grave."
Some funny birthday sayings focus on age, such as, "I’m not going to make any age related jokes because I genuinely feel bad about how old you are." Funny birthday sayings can also poke fun at gift giving, such as, "People who say you are hard to shop for obviously don't know where to buy wine. Happy Birthday."