A person who does not believe in a god. Nothing more, nothing less. It is the opposite of theist which is a person who believes in a supernatural being or deity.
Bob: Do you think god is real?
Rick: No, I am an atheist.
Bob: Oh, that's cool. Me too!
by aj00200 June 29, 2011
Stupid-ass high school and college students who think they know something about life in the real world.
- Cindy says she's an atheist.
- Oh, yeah? Let's ask lil-miss-know-it-all after she has her first pregnancy scare.

- Billy says he's an atheist.
- Really? Let's see how much of a fucking atheist he is when he's supporting an entire family on his income alone and gets fired.
by Spanks*n*Tickles August 24, 2006
A being that doesn't believe in any deity or deities.

A.K.A what you were when you were first born.
Me: Hey, do you wanna go to church tomorrow?
You: No thanks, I'm an atheist.
Me: An atheist? What's that?
You: Somebody that doesn't believe in any deities.
by mynameisjonas45@YouTube.com December 12, 2010
An atheist is...
1. Someone who acknowledges science, evidence, and all things rational instead of pure faith in a deity or deities. Instead of relying on "The Lord" to improve their lives, an atheist would be the best he or she can be.

a. The relationship between Christians and Atheists:

Some Christians attempt to verbally attack or convert Atheists and vice versa. Both have their extremists and their everyday average joe citizens who do not intervene with the lives of the opposite.

The logical thing to do in a situation like this where some of both factions are at verbal war is to simply leave the opposite alone. The saying "If you have nothing good to say, don't say it" comes into play here.
1. Religious Guy: Please Lord bring back my lost kitten, Mr. Snuggles...
Atheist: Dude, Mr. Snuggles is gone?? C'mon lets look for him, I have a flashlight!
R.G: No, no, if I remain pious to the Lord Mr. Snuggles shall return on his own.
A: I'm sure he will...It's a shame...I'll miss that little furry guy..

2. Extremist R.G: REPENT OR BURN IN THE FIRES OF HELL NOW YE GODLESS SCUM!!
Extremist A: GTFO YOU BRAINWASHED TOOL!!

Average Joe R.G: Ah, time for Church.
Average Joe A: That's cool, wanna grab a burger afterwards and talk about some current events affecting our world?
Average Joe R.G: Sure, why not :)
by G42 The Truth November 07, 2008
To be without any religious beliefs.
I am an atheist. I don't believe in heaven, hell, spirits, or souls. I think of after-death as the same state as pre-birth. I have no creed, no rituals, no voices telling me to do crazy shit. Atheism is not a religion. Religious people like to call it one because their narrow minds can't imagine living without at least ONE delusion. If atheism was a religion then disbelief in Zeus would be a mythology, and clear would be a color.
by aslanmane December 23, 2010
someone believing in no religion and or afterlife.
Because Susie was an atheist, she was not bothered by the other students chanting "Go to hell Susie! Go to hell!"
by Dr.Octillary April 08, 2011
Atheist-One who does not believe that God or gods exist. That's it. That's all there is to it. NEVER i mean fucking NEVER judge a whole group of people because of what some of them believe. Yes, some blindly condemn religion. Yes, some are just angry, angst-ridden teens. Yes, some say they don't believe but inside actually do. And yes, some are confused and don't know what to believe, or are just scared to. But some athiests actually CARE about the truth and have done research and personal reflection to come to a personal conclusion based on tons and tons of thought. Also, NEVER assume that you're right! No matter what you believe. Even if someone honestly believe something completely ridiculous to YOU, keep that to YOURSELF. Judging people BEFORE you really know them is parallel to racism, and people can NEVER be judged as a group. Some athiests are conceeded assholes who are so smug cause they believe they're right. But some athiests have considered the possiblities of higher powers and have actually TRIED to believe in greater enlightenment through God. I have my beliefs and that has NOTHING to do with my personality. I can have fun. I can use common sense and rationality. I think about consequences. I think about other people's feelings. I know that my reasons for this disbelief may offend you, so i KNOW that i have to keep them to myself unless asked to say why. People, you have YOUR beliefs of what you think is right. That doesn't mean you have to bring it upon other people, even if you THINK you're doing the right thing. Everyone has their reasons for thinking something, but someone's belief in their own personal TRUTH cant tell you who they are. Please, people respect each other. That's all the world needs. Respect and common sense.
Accept minor flaws, accept human imperfection, and accept people's identities. I'm not perfect. I KNOW there's a possibility that I'm wrong. Maybe some people just need to hear that.
Dude 1: Dude you coming to the party tonight?
Dude 2: Nah, sorry. Got church tomorrow.
1: Alright, man. Do whatcha gotta do.
2: Say you wanna come some time? Just so you can see what I beleive?
1: Sure, why not? I might be atheist, but who knows? Exploring the possibilities may find something that appeals to me more. It would be ignorant to just assume without personal thought that there is no higher power.
2: Glad to hear it.

(You see?! 2 people with completely different beliefs that can still be friends because they accept their PERSONALITIES over religion)
by Mi nombre no es importante. May 06, 2006
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