A saying used by mostly NBA and NFL fans whenever they see a sport that isn't the NBA or NFL tweeted by SportsCenter or Bleach Report. It's often linked to people who grew up fatherless or people with a mental disability
Doing everything possible to fail miserably at any task after success appeared inevitable. Snatching defeat from the jaws of victory. Being one's worst enemy. A reference to the tendency of the Michigan StateFootball team to dominate 3 1/2 quarters only to implode and give the game away to their opponent, resulting in a frustrating defeat.
Example 1: Bill overachieved all year to get that promotion, but got fired for sending that joke about his boss to the whole company. Bill really Pulled a Sparty.