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jarp

British  
/ dʒɔːp, dʒɑːp /

verb

  1. dialect (tr) to strike or smash, esp to break the shell of (an egg) at Easter

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of jarp

from Scottish jaup, jawp to dash or splash like water: perhaps of imitative origin