Home : Online Slang : MMB MMAMP | MMBBG Tweet MMB Meaning Message me back Type Acronym Rank ★ ★ ★  Common Usage Online Only (chat, messaging, e-mail) Comments Similar to WB, but used primarily in online chat and text messaging. Example "MMB as soon as you get this msg!" Updated October 25, 2016 All "M" Slang Terms Online Slang Home Print