1. (noun, verb, adjective, adverb, preposition, direct object, object of the prepostion) combination of the words bullshit and B.S. often used in place of any and every expletive. not to be confused with the wrong spelling "bishi". this is the true form of the word, and the only way it should be spelled.
2. whatever you want it to be.
1. Shut the beeshee up you beeshee!
2. That test was as hard as a beeshee.
3. F-You beeshee!