Definition of didlum in English:

didlum

(also diddlum)

noun

Northern English
  • A savings scheme in which members of a particular group deposit a regular sum throughout the year with a nominated treasurer who shares out the money at Christmas.

    ‘so glad I saved £150 in my didlum for Christmas’
    ‘every department at the Press had a diddlum’
    as modifier ‘Christmas wrecked for workers as £14,000 of didlum savings 'taken' from Hull savings scheme’

Origin

Early 20th century: apparently humorously from diddle + 'em (informal variant of them).

Pronunciation

didlum

/ˈdɪdləm/