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T.M.T. is slang/short for "TOO MUCH TUNA". It is commonly used to describe gay bars being overwhelmed/over-run by straight women, usually the obnoxious, ignorant, self-centered, and loud young college types that are full of themselves and can't hold their liquor worth a shit. For cities with sea ports, this is a far more common problem/issues that cities located inland. Why they choose to invade these establishments remains a mystery to date. Also more commonly found in college towns.
"Fuck, isn't this supposed to be a GAY bar? Look at the large school of tuna that just swam free of their gill nets and found their way upstream to here! TMT! GTFO!" (get the fuck out!)
TMT by SwimSomewhereElse September 5, 2010
TMT means "The Money Team".

Floyd Mayweather's camp is called "TMT" and he also refers to his fans as TMT. He further explains himself and says that TMT is for anyone with the motivaton and dedication to go and make that money. Anyone can join it, even a janitor, long as they all grindin hard for their money, legit or not.
Joe: dude, Jose, you got any money bro? I'm a bumass whiteboy.

Jose: You know i got plenty to spare homie, TMT all day.
TMT by All About That Guap January 6, 2014
It is TMT to ask him to change his plans just for my birthday.
TMT by cather23 May 28, 2010
Sean has an iPhone, Droid phone and Crackberry all the time. Dood, that's TMT.
tmt by websmyth February 19, 2011