1. A little man with an unduly high opinion of himself.
2. Boastful talk; braggadocio.
[Perhaps alteration (influenced by Latin -ōrum, genitive pl. ending) of obsolete Flemish kockeloeren, to crow, of imitative origin.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. a self-important little man
2. bragging talk; crowing
[C18: from cock1 + -alorum, a variant of Latin genitive plural ending -orum; perhaps intended to suggest: the cock of all cocks]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
cock•a•lo•rum(ˌkɒk əˈlɔr əm, -ˈloʊr-)
1. a person of exaggerated self-importance.
2. conceited talk; swagger.
[1705–15; mock Latin, = cock1 + fanciful -al- + Latin genitive pl. ending -ōrum]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.