That's not a thing 

Phrase used to denote frustration with or to dismiss a concept or notion that either

A.) Makes no sense
B.) Is not widely known
C.) Does not exist

Person 1: I heard you were sick, what do you have? Chicken pox? Measles? Armenian Bird Flu?
Person 2: Wha-? That's not a thing

Person 1: This new body lotion I have works by activating the fourth and third chakras
Person 2: That's not even a thing

That's not a thing by BlackMan646 February 5, 2010

it's a thing 

Phrase used to describe a phenomenon, often of some modern cultural significance.

Brunch: it's a thing.

it's a thing by haygirlhayy December 11, 2012

did a thing

When one is so basic that one cannot describe their own actions, they use this phrase and think it's cute. It is not actually cute in real life, it just pisses everyone off due to the lack of information or care to explain any detail of what occurred.

(picture of unlabeled box on counter)
"So today I did a thing..."

(Picture of dirty underwear)
"So today I did a thing..."

(Picture of toilet paper roll)
"So today I did a thing.."

did a thing by grumblestein June 14, 2017

have a thing

When a guy and a girl like each other and do things with each other that one would do with ones boyfriend or girlfriend. However they aren't officially dating

Example: "Do Andrew and Paige have a thing"

have a thing by Dangeri'mawesomeyournot June 13, 2014

to have a thing 

To be basically dating but you not "dating"

"We hang out and like eachother but arent official"
"Oh so yall have a thing"
"Ya we are just going to have a thing, not date"

to have a thing by ..; April 5, 2015

this is a thing 

1) This exists.

2) This is a current fad, fashion, or meme.

People really do travel to dangerous places just to take selfies. It's hard to believe that this is a thing.

Newt Scamander cosplay? This is a thing!

A smartwatch with an analog display: is this really a thing?

this is a thing by BornBlitzed December 8, 2016

we are a thing 

To be in a pre-relationship before actually dating.

"We are a thing" don't tell other people though.

we are a thing by Snap man February 2, 2018