Three.D.I.

Three Drinks In

That inevitable point of the evening (just past T.D.I.) where you turn into a twat. You are no longer awesome. You may as well go home. You realise that she has also drunk too much and all promises and expectation of filthy sex are off the table. From this point on, you are treading water, hoping beyond hope that you can keep her from getting so pissed that you won’t even get a blowjob when you get back. Downhill is the only direction from here.

Three.D.I. immediately follows T.D.I. and can sometimes precede R.F.G. (Random Fat Girl)
Dude 1: "Dude, as soon as we get back, she said she's gonna finally let me in the back door"

Dude 2: "Give it up dude, she's Three.D.I. - It's just you and your hand tonight"
by SweatyG May 08, 2016
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