a gesture of defiance, disrespect, or derision. Idioms. 2. cock a / one's snook, to thumb the nose: a painter who cocks a snook at traditional techniques.
Effect on the Civil War. The importance of the Emancipation Proclamation is that it altered the cause and reasons for the Civil War. At the onset, it was about the Unionâs attempt to bring the Confederates back into the fold. With the proclamation, things changed.
The Emancipation Proclamation was an executive order issued by  Abrahan Lincoln that freed slaves in Southern states. The 13th  Amendment to the Constitution permanently abolished slavery after  the Civil War.he emancipation proclamation was nothing more than an illegal act against the Confederate States only, it was a direct violation of the 13th Amendment of The Constitution. Re â¦ ad Lincoln's own words, he did not care about slaves.