The story
Origin uncertain, possibly a variant of scuddick (“(Northern England, Southwestern England, slang) very small amount; small coin or other object”), possibly related to scud (“(UK, dialectal, dated) piece of twisted straw used to stop up a drain”, noun), scud (“(UK, dialectal, dated) to form straw into scuds”, verb); further etymology unknown.
Etymology from Wiktionary, CC BY-SA 4.0.