When used in a text, TMB means "Text Me Back." While this is its most common meaning in texting, be aware that it is a rare term, and it might mean something else. If our meaning does not fit, give the context of your conversation a name (e.g., love, sport, space, astronomy)...
2 +1 Tag me back TMB is another way to say, "get back to me when you get a chance" in messages. It comes from the actual game of tag, where participants respond back and forth. You will likely see it in messages, whether they are texts (may mean "text me back" in this case)...
Abbr.Meaning IRL In Real Life Texting, Pregnancy, Social Media BRB Be Right Back Texting, Social Media, Internet Slang IMO In My Opinion Texting, Social Media, Internet Slang FYI For Your Information Texting, Internet Slang, Social Media JK Just Kidding Texting, Internet Slang, Social Media LOL...