The story
Variant of chuck; or alternatively a diminutive of chump (“chunk; block”) + *-k (diminutive suffix) (compare hunk from hump, etc.). Also compare Dutch schonk.
Etymology from Wiktionary, CC BY-SA 4.0.
chunk
Today it means: A part of something that has been separated; a generally squat, thick, irregular piece of something, e.g. wood or stone. Full definition →