Slang Used as a term of familiar address, especially for a man or boy: See you around, bub. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "bub" in a sentence
"The hug a bub is a very secure carrier, (we hope to stock it in the new year) or the moby is a cheaper version."
"My bub is almost 10 mnths, has never slept thru the night and everything you just said about Jasper could have been about my Henry."
"I don't understand what all the hub bub is about VM?"