The more ridiculous you make the mem, the more it will help it to stick in people's minds. And the more fun everyone will have when reading it.
For this word, imagine DISMISSing Shrek as childish nonsense. You are DISMISSing the *LIME-OGRE*. img:http://static.memrise.com/uploads/mems/32000111128030310.jpg
Now just wait and see how well that word sticks in your mind.