Top Definition
-adjective.
1. of, pertaining to, or characteristic of Sheldon Cooper's euphemisms (one of the main characters of the CBS television series Big Bang Theory), his obnoxious personality or his failed attempts at correctly speaking different foreign languages, i.e., Chinese or Swedish.

-noun.
1. the language of Sheldon Cooper other than English.
Sheldon was attempting to converse in Chinese with the restaurant owner but he was actually speaking Sheldonese and happened to offend the said owner.
by _masarap_ August 22, 2010

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