n.
A deep draft, especially of liquor; a gulp.
tr. & intr.v., swigged, swig·ging, swigs.
To drink (liquid) or engage in drinking liquid in great gulps.
[Origin unknown.]
swigger swig'ger n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.