Pat's Parade

An excessive celebration thrown over the achievement of an unearned goal obtained by false means that only a minority of the population accept as legitimate

Example 1: After being down by 20 points during a pickup basketball game, the person announced "this point wins the game!" After said announcement, the person charged at the hoop, sank a layup, and roared in "victory". He then marched around the gym like a bafoon while everyone in the gym watched his Pat's Parade in disgust.
Example 2: After Judge Berman allowed Brady to escape his, what seemed at the time to be, his inevitable punishment, Patriots fans joined together in mass unison in to form a Pat's Parade that rivaled the gathering in Jonestown. If only it had the same result.