Definition of "MB"
MB
symbol
(computing, formal) Abbreviation of megabyte.
(computing, informal) Abbreviation of mebibyte.
noun
plural MBs
(China, slang) moneyboy.
(computing) Motherboard.
(military, US) Initialism of marine barracks.
verb
(knitting) Abbreviation of make bobble.
interjection
(Internet slang, text messaging) Initialism of my bad.
adverb
not comparable
(Internet slang, text messaging) Abbreviation of maybe.