look up any word, like lemonparty:
 
1.
Verb - to be so self assured and confident, verging on arrogant, before undertaking a public task that you then find that you become incapable of completing said task. The resultant public humiliation and self loathing resulting from such an abject public failure provide mental scars for life.
Donaduncan - AC Milan in the 2005 Champions League final, 3:0 up at half time and lost by being too cocky.