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.
One important thing that Abraham Lincoln did as president was to  order the Emancipation Proclamation. Issued on January 1, 1863,  this order called for the freedom of slave â¦ s in the ten states still  in rebellion.3 people found this useful.e also wrote a very important document called the Emancipation Proclamation which stated â¦ that slaves would be freed in confederate territory, not in the north. Abraham Lincoln let slaves become free in 1866 and was the first president to lead the country into war.