That's a neck. 

The comedic action of hitting yourself/someone on the neck due to doing something unintentionally stupid.

Person 1: "Hey, what does 'name' mean again?"
Person 2: "That's a neck." They then slap (Person 1) on the neck.

That's a neck. by IntoxicatedBoy October 18, 2017

That's a neck 

When your friend be doing some dumb shit so you need to be discipline them with a firm slap on the neck.

"Yo what's 2+2"? "young blood i think it's 8". "Nigga that's a neck".

That's a neck by neck,necking,dumb thot December 11, 2017

That's A Neck!!

When someone says something so stupid you can't beleive it and you totally reject the fact that they are a straight A student.

One day I was walking down the beach with some friends when one of them shouted, "Look at that dead bird!" Someone looked up at the sky and said, "Where?" <tHAT is a Neck!!!

My friend and I were eating our lunch in the cafeteria, when we overheard one of the assitant teachers talking about the sunburn she got on her weekend drive to the shore. She drove down in a convertible, but "didn't think she'd get sunburned because the car was moving." That's A Neck!!!

That's A Neck!! by Thatin' June 20, 2007

That's A Neck 

When you say something that doesn't make sense or something stupid. When someone says a neck you swipe there neck as hard as possible. To not get necked you must say no neck.

Your watching the World Cup and the guy sitting next to you says when will Barclona and Argentina verse that's a neck.

That's A Neck by boomz.the.saiyan June 4, 2015

That's a neck 

when you say something really stupid and someone says "That's a neck!" Ya might wanna say 'self serve', 'soft serve' or 'mirror'. Self serve is when you do it yourself, soft serve is a light slap in the neck and mirror is when you do it to the person who said "that's a neck". A neck is when you slap the shit out of their neck.

Girl : 2+4=8 !
Boy : that's a neck

That's a neck by TbhImElyssa May 14, 2016

that's a neck 

When someone says something dumb and you need to hurt them, but not so much that they cry. Just enough for them to know they a dumb motherfucka
A slap on the back of the neck

"Aren't fingers and toes the same thing?" asked Gouda.
"Uh," I started. "that's a neck."
"Aw man", said Gouda.

that's a neck by N.Y Nora July 23, 2018

That's a neck 

When something goes bad.

"Dang bro, your mom died. Dang, that's a neck. I feel bad for you."
"Shut up, I no longer have a home, I live on the streets, is that funny bro?"
"I'm sorry, but that's a neck."

That's a neck by Mauch January 31, 2019