twenty dollars worth of weed. amounts can vary depending on quality but is usually about a gram. Smallest amount usually available in most areas, you can tell if someone doesn't know what they are doing if they ask for a dime or nickle. a 20 sack is the perfect amount to roll a nice blunt with if you know how to roll.
"I got five on the 20 sack."
by smokn'weedalldaydontgiveaFUCK June 21, 2009