outpouring

Etymology

out- + pouring

noun

1. The sudden outward flowing of a large amount of something.
   The protests rank among the largest outpourings of dissent since the nation’s military dictatorship ended in 1985. June 18 2013, Simon Romero, “Protests Widen as Brazilians Chide Leaders”, in New York Times, retrieved 2013-06-21
   Great Britain has collected its first gold medal of the London Games after Heather Stanning and Helen Glover won the coxless pairs with a stunning performance that will spark a mass outpouring of celebration and relief across the country. August 1 2012, Owen Gibson, London 2012: rowers Glover and Stanning win Team GB's first gold medal, Guardian Unlimited