Something you say when you see something really cool, or a hot girl walks by. You can say it even if you never talked about the subject before.
Two dudes sitting around.
15 minutes of silence
Dude #1: "Look at that chick!"
Dude #2: "That's what I'm talkin about!"
by whodey June 16, 2004
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expression of approval or anticipation
Dude 1: "Dude, check out the size of that cheeseburger!"
Dude 2: "Now, that's what I'm talking about!"
by Fronck June 2, 2008
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Etymological note: This phrase can be heard in a recording of the (ca.) 1929 Fats Waller song "The Joint is Jumping".
"Get rid of that pistol, yeah, get rid of it... yeah... ha ha... that's what I'm talking about..." (from abovementioned recording, spoken)
by Tyranny Sue July 11, 2008
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"Now that's what I'm talking about'!

'A catch phrase' commonly used to express 'enthusiastic support' for a particular 'subject/or subject matter'.

(With more of an emphasis placed on the word 'that's')
*acronym/abbreviated form: NTWITA or TWITA 'That's What I'm Talking About'.
Example:-

A guy just opened his first pay check- and he discovered, that the amount of money enclosed, was a lot more than he was expecting!

-> so he say's (while nodding his head in approval)~ 'Now that's what i'm talking about' !
by Stump cap November 24, 2013
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An expression used to diffuse responsibility for an unpopular statement made in a public setting. Typically used to imply complicity or collusion on the part of an unwilling stranger.
You: I mean, really, who hasn't made out with a rundown fat chick in a moment of drunken desperation.

Crowd: *silence*

You: *smile and point to a random guy in the crowd* This guy knows what I'm talking about.
by Ggggggaaaaaaaaaaaaaaaa March 23, 2009
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