ti89 

a high-end graphing calculator from Texas Instruments capable of 3D graphing, computing definite and indefinite integrals and derivates among with numerous useful features.

a: did you get that second problem from last night's homework?
b: yea, of course.
a: how? we didn't learn how to integrate logarithmic functions yet!
b: we didn't but my ti89 did!
a: you bastard!

ti89 by alperthereal February 10, 2004

Ti89 

The Holy Grail of Calculators. This baby can do everything from calculate how much you need to tip your lovely waitress to graph a complicated integral that even your Calculus teacher will be amazed by. O and don't worry it can do much, much more. Too much, that a normal human could never actually figure out all it's features in an entire lifetime. It is the Ultimate / Only friend of an Engineering Major.

Kim : I looked up Calculator in the dictionary the other day, and it wasn't defined!

Tom: What do you mean?

Kim: All it said was: See Ti89.

Ti89 by KBUR August 10, 2008

ti-89 

a secret organization only known by those who have a calculator of the same name. While other math students fumble with equations, the TI-89er relaxes as s/he's just used the solve() function. And as all the other dumbasses observe, s/he simple responds "TI-89," and other students will simply cower and look elsewhere.

Oh, the TI-89's? Well, if I told you I'd have to kill you.

ti-89 by Orion January 15, 2004

ti-89 

Graphing calculator that has the meaning of life. Not only does it do math for you, but it also does your laundry!

The AP board is examining your test, and sees that you miraculously have the answer in one step. The justification is "Ti-89".....automatic 5!

ti-89 by la Morsa December 11, 2003

ti-89 

1. A far superior model to its counterpart, the ti-83. Can graph 3D functions, differentiate and integrate and calculate Taylor series. The symbol of a true math or science geek.

2. The main reason I'm passing college math.

1. I really need to get a ti-89. This crap is too hard.

2. I LOVE MY TI-89!!!

ti-89 by BKred January 18, 2004

TI-89 Titanium 

God's calculator. Most of the questions of the SATs that require solving for variables or solving trigonometric identities can be solved by simply plugging them in to this beast of calculator.

John: "Hey Randall, what did you get on the math section of the SATs?"

Randall: "Oh, just an 800"

John: "800?!?! Didn't you get a 550 last time?"

Randall: "That was before I got my TI-89 Titanium!"

TI-89 Titanium by Randwulf October 6, 2009

TI-89 titanium 

An upgraded version of the TI-89 released by Texas Instruments in 2004. Features a new mini-USB port and 2.7 megabytes of flash ROM.

n00b: lol, check out my hip TI-89! I have 6 games on it! I am cool!
1337 h4x0r: stfu n00b, I have a titanium, I have 50 games.

TI-89 titanium by asdfadfasdf August 23, 2005