verb (used with object) South Midland and Southern U.S.
to toss or throw; chuck: chunking pebbles at the barn door.
to make or rekindle (a fire) by adding wood, coal, etc., or by stoking (sometimes followed by up).
Origin of chunk2
1825–35, Americanism; perhaps nasalized variant of chuck1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a thick solid piece, as of meat, wood, etc
a considerable amount
Word Origin for chunk
C17: variant of chuck ²
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
"thick block" of something, 1690s, probably a nasalized variant of chuck (n.1) "cut of meat;" meaning "large amount" is 1883, American English.
Online Etymology Dictionary, © 2010 Douglas Harper