I think so 

A way of saying that you don't know but want to make it look like you might know. Similar to saying "I'm pretty sure," but could also mean "I'm not totally sure."

Soldad: Did you do your homework?
Sonia: I think so.

Jeff: Is the final tomorrow?
Lola: I think so.

Chris: Do you understand the words that are coming out of my mouth?!
Jackie: I think so.
Chris: Is that a yes or a no?

I think so by Insufficient Postage May 9, 2006

I think so 

When someone named manny says I think so to a simple question that a yes or no answer only

Girl -"So are we still friends "
Manny- "I think so"

I think so by Extra classic bubble gum September 3, 2019

i dont think so 

What smelly people from texas that now live in new hampshire say

Are you from texas?
I don't think so
but you are!
I dont think so

i dont think so by lool September 21, 2003

Oh I Don't Think So 

A quote used by a bold one whilst facing a robotic general that's shorter than expected. It is used to counter said general's claims that he is doomed.

"Army or not, you must realize... YOU are doomed!!"
"Oh I don't think so"

Oh I Don't Think So by hihunter777 January 27, 2019

I don't think so (EXO) 

A line repeatedly used in the song Obsession by exo. Said in a classic monotonous voice by the x-exo clones, It has become a meme among exols. Personally speaking, this is a line that will live on forever. It's like Shawty Imma Party Till the Sundown or chogiwa.

1.

Exols: Please give exo proper promotions .
SM: I don't think so (EXO).

2. Exols: Give Sehunnie more lines.
SM: I don't think so.

3 . Exols: We want a comeback with Lay.
Sm: I don't think so.

I don't think so (EXO) by ExolEriEgg No bias November 27, 2019

I don't think so biatch 

adjective noun; a conversation ending phrase akin to "GI Joe" and "No soap, radio!"

"Do you have to register?"
"I don't think so biatch."

I don't think so biatch by three newtons February 17, 2004

I don't think so biatch 

Adjective noun; A phrase of impending animosity which is commonly used in conversations that do not have an advesarial tone.

"Does Tufts have rolling admissions?"
“I don’t think so biatch.”

I don't think so biatch by 3 Coulombs February 17, 2004