8 ball

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun literally, billiards The eighth numbered ball.
• noun A cocktail made with vodka and V8 vegetable juice.
• noun slang, African American Vernacular An eighth of an ounce, especially as a drug quantity.
• noun slang, African American Vernacular 3.5 grams of cocaine.
• noun slang, African American Vernacular A 40 ounce bottle of malt liquor
• noun slang, African American Vernacular The alliance of the Folks and Crips (two gangs).