An acronym for the phrase "My opinion is my opinion." It is an acknowledgement that what you are saying is an opinion and may not be shared by others. Can be used instead of the shorter but also inferior IMO (MOIMO).
Kids need to tell their parents, moimb!! 'Cause forcing a kid to wear a mask is child abuse. Besides, masks don't even work. Go look up the Danish study, November, 2020. And Del Bigtree.