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2.
Noun, verb, adjective. A variation of the word "bullshit".
n. "Don't give me that bullshack."

v. "What? Are you trying to bullshack me?"

adj. "That was a bullshack call."

by L. Belfoy November 19, 2006
 
1.
A term derived from the outburst, "That's bull, Shack!" Signifies that the previous statement or command is unnecessary for further development as a contributing member of society.
Teacher: You will now write thirty essays over the development of the British neo-Nazi party.

Class: That's bullshack!
by Legacy '09 April 20, 2010