I rarely have to discuss it, except for people trying to convert me.
Those I enjoy talking to, because I have lots of questions.
Like - If God wants us to read his Holy text, why doesn't it appear in your hand, in your own language, whenever you ask? No questions about which is the right book, or the right version, or anything. Religious people can spend time providing food and blankets, instead of books.
Or - If there is One God, why didn't explorers reaching China, America and Australia find that people there had already heard of the same God the explorers worshipped?
Or - If the people were sinful, why did God kill all the animals in the Noah flood? Why not take them up to heaven, and let them all breath water? And did he drown the animals in Australia, when there were no people there?

i don't bring it up unless im asked or it needs to be brought up, in my experience most of the time it doesn't really matter

When appropriate I will simply say that I do not believe in the supernatural. If asked to explain I say that when confronted with the unknown I do not automatically attribute it to some supernatural being.

I say I’m agnostic, it softens it a bit.

I don't. it would be pointless at this juncture in this country

If it comes up in conversation, I'll come right out with it. I'm not afraid to step on some toes and hurt some feelings. But I don't go around telling people that I am.

I say, "I am an unabashed atheist!" If christians are standing at my front door preaching I literally chase them off the property all the way to the curb and tell them to take their filth with them referring to their bibles and tracts. Two women once showed up at my door with a couple of young children in tow. I loudly accused them of child abuse, ordered them off the property an had one woman in tears on the sidewalk. I hope it was a revelation.

So glad I live in a place where it's really not an issue and I'm not having this garbage shoved down my throat daily. On the occasional visit from Jehovah's witnesses, I tell them to beat it.

I generally don't bring it up unless it's germane to the conversation. When I do, I usually say I am "non-religious" or "not a believer." I don't hide my unbelief or pretend to agree with them, but I live in the American South and the "A" word is sometimes taken as a personal challenge. I don't care to challenge or confront people who are not challenging me. But it's different if someone is intrusively trying to proselytize.

You could say "I am not a church goer," or " I am not a believer."

That kind of depends how the subject comes up. If we seem to be hitting things off and I think they should know where I stand, I just calmly tell them my stance on belief and hope for the best. If they're constantly talking about their religious views, or start off with religious rhetoric from the moment we meet, then I'll just tell them right out that I don't believe in any of it, and as long as they don't push it on me, we're cool, but if they do, I'm out.

I just come right out and say.. I am non religious.. I don't need that in my life. It serves no purpose for me. They ask me.. so you don't believe in god? I come back with... which god are you referring to. That usually stops them dead in their tracks.

I never bring up religion unless someone else brings it up first, or if i'm venting about something and it just happens to slip out. If religion is brought up, most people around me are religious, and they'll ask me if I am, I always respond no. They then want to question why I am not, and tell them it doesn't matter and to just move on.

I tell them straight out - I am not ashamed of being an Atheist and I remind them that my parents taught me to think for myself, question, read and then make a decision.

I'm straight forward about me being atheist but I don't bring up religion, unless someone else starts it. I'm respectful about it and will talk about it, but I do tell tell them if they ask me.

Unless it comes up, I don't. Have been known to hedge by saying "I;m not Christian". Being braver now and just saying "atheist" if they're trying to push a religious identity on me.

i tell only the ones who ask me. to be a muslim and one day to say to people who know you you are an atheist its like you make a decision to die! so i chose to tell only who i am sure that they will understand and who don't judge.

Whenever it seems appropriate or necessary, I tell people simply that I am an atheist. If they want to pursue that for whatever reason, I will engage them. I am who I am and if other folks can't deal with it, it's not my problem.

I really only mention it in response to someone pushing their religeon onto me, otherwise live and let live.

I just let them know if they bring up religion.

When a conversation turns to this subject, I always just say that I am a devout atheist, and the subject usually gets abruptly changed.

If asked I am honest and very proud of it. But I do not walk up and ask someone if they are a christian etc because I find it rude. If it comes up in conversation then ok. Lets talk.

if asked i say i am an atheist
but i don't go round shouting about it
i don't like the godsquads preaching at me so why would i do it
if you have a mind decide for yourself

I just say it no shame here.

all of my wife's family are very religious so I pretty much keep it to myself, if any one were to ask I would not deny it though