Definition of "lemonade"

lemonade

/ˌlɛmənˈeɪd/

noun
countable and uncountable, plural lemonades
1. (US, Canada) A flavoured beverage consisting of water, lemon, and sweetener, sometimes ice, served mainly as a refreshment.
2. (UK, Australia, New Zealand) A clear, usually carbonated, beverage made from lemon or artificial lemon flavouring, water, and sugar.
3. (slang, derogatory) Recreational drugs of poor or weak quality, especially heroin.
  Quotations
  In fact, a recent report from Denver shows it [street heroin] was about 1 to 2 percent and the addicts that are receiving this in many cases refer to it as lemonade, because it is so weak.
  1965, United States Congress, Hearings before the Subcommittee of the Committee of Appropriations, page 128
  Lemonade — heroin; poor quality drugs
  1996, Karen Bellenir, Substance Abuse Sourcebook