that's interesting 

That's not interesting; actually, it's stupid.

Person 1: I really think Trump will make a good president.
Person 2: That's interesting.

that's interesting by Doctorjay March 15, 2017

That's interesting 

What someone says when they're either obsessed with jack sparrow or really, really uninterested.

person 1, grabbing a book, "i think we should start homework now"
person 2, making a paper plane, "that's interesting"

That's interesting by lennøx July 27, 2020

"That's interesting Simon!"

Used when someone states the bloody obvious, taken from playwright Alan Bennett's Talking Head "HER BIG CHANCE", the story of a vaccuous actress who employs this phrase constantly when trying to seduce the director of a porn film, the aforementioned Simon.

He said: "When you go to school, you learn stuff." She said, "That's interesting Simon!"

"That's interesting Simon!" by LucyVee April 25, 2006

that's very interesting tell me more 

if you use this sentence the speaker then knows you don't give a shit about his or her speech and that you want to die

9 Year Old Kid: and then I got so many v-bucks *flexes*
Me: oh that's very interesting tell me more

that's very interesting tell me more by budgetsheep February 18, 2019

thats interesting 

usually something that may be interesting, provided the deliverer of the comment ACTUALLY bothers to elaborate as opposed to leave it as an open-ended comment...

Christof piped up on Ventrilo 'thats interesting' and it wasnt.

thats interesting by The Great Soprendo January 10, 2009