IMHO definition by American Heritage Dictionary
abbreviationThe 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.
in my humble opinion
imho - Computer Definition
Chat room talk meaning “in my humble opinion.”
"In my humble opinion." Variations are IMO for "in my opinion" and IMNERHO for "in my never ever remotely humble opinion." See digispeak.