keg

noun

1. a small cask or barrel, usually holding from 5 to 10 gallons (19 to 38 liters).
2. a unit of weight, equal to 100 pounds (45 kilograms), used for nails.
3. Also keg·ger. a keg party; beer bust.

noun

1. a small barrel with a capacity of between five and ten gallons
2. British
   1. an aluminium container in which beer is transported and stored
   2. Also called: keg beerbeer kept in a keg: it is infused with gas and served under pressure

n.

1630s, earlier kag (mid-15c.), from a Scandinavian source, cf. Old Norse kaggi “keg, cask,” of unknown origin. Cognate with Swedish kagge, Norwegian kagg. Specific sense of “barrel of beer” is from 1945. U.S. student slang kegger “party featuring a keg of beer” attested by 1969.

see sitting on a powder keg.