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1.
A term used to describe the wrath of Behavioral Analysis Unit Chief Aaron Hotchner (known as 'Hotch'), of Criminal Minds fame. Usually cool, calm, and collected, Hotchner has, on occasion, lost the plot with an unsub during a case. The result is terrifying.
OMG, did you see the Hotchalanche in last night's episode?

(general exclamation when it dramatic Hotch-related event occurs) HOTCHALANCHE!
by gilesy_09 August 22, 2009
 
2.
The favoured drink of Aaron Hotchner's top fan group, the Hotch Honeys. Punch and Vodka.
The Hotch Honeys were happy when Hotch had his Hotchalanche in Exit Wounds
by Crmb July 22, 2010