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1.
To add subtitles about some topic to clips from the movie Downfall (Der Untergang) showing Hitler screaming at his generals in the bunker.
'Did you see the Downfall about Burning Man?'

'She needs to be downfalled sooooo bad!'
by Jack Parsons January 29, 2010
 
2.
Eating a big meal (usually between the hours of 11pm and 3am) caused by smoking marijuana and getting the munchies, after already eating dinner.
Stoner 1: "I downfalled so hard last night, after a steak dinner with my parents I had a master sesh with some homies and ate two Big Macs at Mickey D's.
by JDRstoned August 17, 2009
 
3.
A runescape clan that has some good tanks and was recently #1 in twr,but they never beaten tempted killers wich is now #1.
one of downfall good tanks are naruto12483,kerrigo,but unfortunatly one of their pro tank jst_unit01 left because of some ass hole in the clan
by jstX1671 August 07, 2009