Definition of laccy in US English:

laccy

(also lackie, lacka, lacky)

noun

informal
  • Elastic. Also occasionally: an elastic band. Somewhat rare except in lacky band.

Origin

Early 20th century; earliest use found in Rudyard Kipling (1865–1936), writer and poet. Apparently a hypocoristic shortened form of elastic.

Pronunciation

laccy

/ˈlaki/