If you are always eating things, you have OBCD.
The above joke that I received in an e-mail reminded me of the amusing and "progressively lipogrammatic epistolary fable", Ella Minnow Pea,
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Or, of course, CDB by William Steig.
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lipogram
n. A piece of writing from which all words containing a particular letter have been deliberately omitted.
pangram
n. A sentence that uses all the letters of the alphabet. ex. The quick brown fox jumps over the lazy dog.
