"Hey, im Agnostic". "Whats that?" "Basically it means I'm Atheist, but I admit I could be wrong"

I usually avoid religious discussions the way I avoid discussions about Harry Potter or any other work of fiction. If, however, I am dragged into a religious discussion, I inform them that the scriptures were written by a bunch of people with no Idea of how to store grain. This allowed hallucinatory fungus (ergot) to grow and make people see a lot of strange things like talking snakes, talking bushes that burn funny, haloes around heads, and angels. This usually gets them to change the subject

To their face. If they don't like it, they can go back to the Garden of Eden.

Sexual pecadillos between adults are are none of my business, nor IMO anyone else! The 2 women you mention, history I have Never heard that version before, and who was fired, exactly, for "ordering her to the motel "????!
Plus they seem to both have made aplenty of money both during and since then. And I say this as one who absolutely believed Anita Hill from the get-go.

yes! there isnt any simpler way!

"I am an atheist."

Telling a Christian your an atheist tends to kill the conversation in my experience

Say it like you are saying "I ride a bike"

I don't feel compelled to tell most people anything unless it comes up. I'm open to discussing belief systems with anyone who seems to have a curious and open mind. Otherwise if they ask I tell them I'm a practicing equestrian. That often gets me a Blank Stare, but it's true that I have a horse, and most horses I know have better ethics and are better company overly religious people tend to be.

From my experience religious people are so judgemental

At this time, I don't say anything about my personal beliefs. However, I'm making progress. How?
I no longer tell people "I'll pray for them" especially in situations where they're asked for. Instead, I tell family and friends and even strangers I'll be thinking of them or I'm sending positive thoughts and vibes their way. If point blank asked, I say that I don't believe there's some guy in a white robe up in the sky waving a magic staff deciding one person will get cancer and another will win the lottery. We all have control of our own lives. [BTW, I'm from Georgia (USA) so my actions are considered blasphemous.]

You don't tell them.... Let them believe you are one of them. One more bogus belief on their plate is not going to hurt them ?

Yes Lucy, I am discovering groups like this and am so glad to have fellow non believers! I do get the fisheye at work but there is no way I could be like them or want to stoop to their blind faith. Someone said to me the other day I am so nonjudgemental and I thought to myself, that's because I'm not religious. Lol...

I find most people treat me like I have a flu or something when I tell them I don't believe in any God.

I don’t unless I’m (rarely) asked. If I am asked, I just tell them. If they’re religious, and want to rngage with me, I refuse. I just tell them there’s no point as we’ll never agree. If they persist, I literally walk away.
But I’m lucky. The UK is a very irreligious country, so on the very rare occasions that I am asked, I usually only get the merest hint of a raised eyebrow. Most Brits are alleged to believe in god, but the vast majority of those simply don’t care enough to be bothered about what they believe, let alone what anyone else believes.
I feel for American atheists. It must be very hard sometimes.

I don't introduce myself as someone who doesn't collect stamps because it doesn't define who I am. If they ask me where I get my stamps, I'll tell them I don't collect.

Same thing with atheism. I don't define myself by non belief, but if they ask me about what religion I am I'll tell them.

I just say I'm not religious. Saves the confrontational judgment. In this culture, you're still judged as immoral if you don't believe in their myths. But, it is getting better. The younger generation seems to be more objective.

I was born Jewish but I call myself a Free-thinker or an Agnostic. In other words a Don't Know!

I tend to only say that I am an atheist if I am asked or if a religious person has started insulting atheists.

My (non)beliefs are personal. I'll share them if asked or if someone's trying to force their beliefs on me. And I refer to myself as a non-theist, not an atheist. Purely a personal preference. I'm a deeply spiritual seeker ... I just don't believe in a being god.

I say "I'm and Atheist"

I just say I'm a follower of Odin of the Norse beliefs, the beliefs of my ancestors.

I prefer to tell them as soon as it's brought up. I tell them that I am not here to tell anyone they are wrong and I expect the same. I try to be open minded and thoughtful. I feel that being honest about my beliefs and my views saves headaches later on.

The first thing to ask yourself is would you have a problem if they told you they are Christian? Obviously, I assume not. As they have no problem stating they are Christian; you should have no problem stating you are an atheist. There is no right way to say something, If they have an issue of just a simple difference, then that's on them, and not you.

Around here, if you are antitheist, never let them know where you live. You'll have a flaming cross on your lawn!