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1.
To describe something that is dank as shit.
"How did it go last night?"
"Yo her pu$$y was so blerch!"
by Brad the Wall October 02, 2014
 
2.
describing anythin extremly disqusting.
jane blerched all over the food in olive garden

aww man! i just blerched my pants

honey! the baby blerched all over the new tv
by tether foot August 05, 2009