"Happy Birthday, Or Else!" is a humorous and whimsical song by Parry Gripp. The song revolves around the idea of ensuring someone has a happy birthday and the consequences that may occur if they don't. The lyrics convey a sense of playful threat, as the singer promises to write a memo, use a big red pen, and even post it on the birthday cake if the person is not smiling. The repeated phrase "Have a happy birthday, or else!" emphasizes the importance of being happy on one's special day. The song also includes an amusing warning from the singer, stating that they cannot be held responsible for their actions if the person does not have a happy birthday. This adds an element of absurdity to the overall theme. Overall, the song is intended to be light-hearted and comical, poking fun at the idea of the pressure to be happy on birthdays. It captures the essence of wanting to make someone's birthday special and memorable, even if it means jokingly threatening them with consequences.