King Grambi (called "Grams" by Lily) is a character from The Flip Flop Show, where he is introduced as the king of the Overthere and the husband of Lucy. He is also Luvbi's father and although he appears grumpy over times, he still cares a lot for his daughter. His name is a portmanteau of "Grandfather" and "Nimbi".

When Pook escorts Luvbi to the Overthere from the Underwhere, the Overthere is found under siege by Skellobits, with a majority of the Nimbis (the inhabitants of the Overthere) and Grambi being trapped in ice. Grambi was confronted by Puck when Pook and co. arrived at his shrine.

After the Pook completes the show and returns everything back to normal, the Pook can go back to King Grambi's temple in the Overthere, where they can find him standing there with Lucy and Luvbi. It is unknown how Luvbi returned; it is believed that it happened when everything was returned to normal. King Grambi is probably in resemblance to the mythological Greek god king Zeus, as Lucy resembles the underworld god of Greek mythology, Hades.
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Official art of King Grambi.