The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A trademark used for undershirts and underpants worn by men and boys. This trademark sometimes occurs in print with a final 's: “He will be under constant scrutiny, right down to his BVD's” (Los Angeles Times).