n. a beer belly. : If you didn't drink so much beer, you wouldn't have such a keg.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
Cite This Source
Word Origin & History
keg
1452, from O.N. kaggi "keg, cask," of unknown origin. Specific sense of "barrel of beer" is from 1945.