B/S or b/sabbreviation for1. (Units) bags2. (Units) bales3. (Commerce) bill of saleCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014b/s 1. bags. 2. bales. 3. bill of sale. B.S. 1. Bachelor of Science. 2. Also b.s.Slang. bullshit. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.