Tubby Custard Tummy is a Teletubbies segment. It appeared in the episode My Mum's a Doctor.
One day in Teletubbyland, it was time for tubby custard. Po woke up and got ready to make her tubby custard. She got her tubby custard bowl, lowered the tubby custard tap, and pushed the button. She got her tubby custard and went to the table. She happily ate her tubby custard. Po likes tubby custard very much. So she went to get some more. She got more, then she started eat a little too fast. Po likes tubby custard very, very much. So she went to get some more. She got more, then she ate too quickly. Po likes tubby custard very, very, very much. So she went to get some more, but this time, she ate very very fast. And then she hiccuped, and dosen't feel good. Oh dear, Po, tubby custard tummy. Sometimes if the Teletubbies eat too much tubby custard, and if they eat their tubby custard too fast, they get tubby custard tummy. Laa-Laa came in and said "Eh-Oh" to the viewers and Po. Po told Laa-Laa that she had tubby custard tummy. Laa-Laa helped walk Po to her bed. She helped put the blanket on her. Laa-Laa sang, "Tubby custard tummy, tubby custard tummy, tubby custard tummy, oh dear, oh dear, oh dear". And then, Po fell asleep. When she woke up, her tubby custard tummy disappeared. Laa-Laa's song worked. Po felt all better now, and she and Laa-Laa had a big hug, and bumped bellies and bottoms.