"Tyrannosaurus" is an addictive pop tune with an impressive hook of "Tyrannosaurus, saurus, saurus." The "Tyrannosaurus" in the title refers to a man she likes. He's big, strong, and a little scary, but actually gentle and has a "baby" side- The song playfully depicts the thrilling romantic feelings for such a "cute-but-scary" guy. It's a viral pop number perfectly suited for the UGC era, completed by dancing, singing, and posting the "Garugaru Dance" that will make your body move.