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1.
synonym for "rock slide"
Savannah: "What if, right now, there was a rock-alanche?"
Matthew: "...avalanche? You mean, ROCK SLIDE?"
by iamawesome2891 March 13, 2011
 
2.
The falling of large quantities of rock
The rockalanche buried three cars on the mountain road.
by Mttzzzz December 19, 2010