This is a minor spoiler alert, but Deema says a pretty funny quote in the season 3 episode "The Wizard of Oz-trailia". It was just before Nonny was explaining what marsupials are. Deems was having difficulty pronouncing "marsupial" so she said this:
Deema: Marsu-peoples...wait, what?
In that same episode, Mr. Grouper was pretending that Bubble Puppy was a Dingo (which is a wild Australian dog) and Deems led the random but hilarious "Dingo Song"
Deema: *singing* There was a wild Austrailian dog and Dingo was his name-o.
Deema, Molly, Oona, Goby, and Nonny: *all singing* D-i-n-g-o! D-i-n-g-o! D-i-n-g-o! And Dingo was his name-o. *laughing*
I know another funny Deema quote. Remember "Triple Track Train Race"? In the storybook, the Machu Picchu Choo Choo made the baby llamas cry. When Deema was scolding him for it, she said "See what you did? Now we've got baby llama drama!"
Not only is that one of the funniest lines Deema's ever said, but it's also the best and most memorable line in the whole episode.
No one brought up "the suspense is maddenin" from Happy Clam Day yet? Well then I'm gonna do it, because that quote really cracked me up. Many Deema-Quotes manage to crack me up, but that one is from season 1, from an early episode. It has dat classic-bonus^^