In an IRC conversation one, LoneCat stole my vocabulary, and I had to communicate using only the words I was given. It was more fun at the time.
This is the basic dictionary of the language I created then:
Mackeral Ownership Herring Words Shag Multiple Mu None/Negitive Cliff Positive shell One Seaweed Link Muu Speed joy also happy Permission Penguin happiness Boingy Pain Splat Friend
Mackeral Shagherring? MU - My Dictionary. NO
Mackeral shelllseaweedsplat