Would This Be A Copyright Issue?

I'm not asking for legal advice, just opinions, or if anyone has ever done this before.

If my website tagline is "Everything 'Google' isn't" would I get in trouble or sued by Google, if so for what?

And NO I am not actually creating a site like Google, I just used that as an example. Thanks to anyone who replies

My take on this is that it would depend on the trademark and or copyright holder.
The larger the corp, the more likely they've got lawyers with lots of time to waste on guys like you.
I think BassTracketBoats had one xandroidy.tld domain hijacked by google and some others were attacked by facebook wanker legal department for having facebook in domain tld and selling fb likes.
If they see and find you a threat, regardless of size, they will attack you with threats. I believe twitter is also crazy about twitter botters. And there might be more lunatic companies out there, too.
It's a complicated topic and only a knowledgeable person in legal matters could advise you. Especially since in US, sueing and issuing legal threats is the favourite pastime of the populace.

What type of website is it? If it's a parody or critiquing website, then you can most likely get away with putting that in your tagline (e.g., GoDaddy Sucks and ihatetarget.net). However, if the company name that you're trying to use in your tagline feels that you are trying to harm or steal their business, then they may pursue legal action in the form of litigation.

Many people fear legal action from larger companies, although it's the little companies that you should be afraid of as the larger companies are the ones who (depending on what you did) usually just give you a warning first. The little guys are always ready to sue for any and every reason to get more money.

Google will jack your domain if you try to pretend that you're google or associated with them.

If your site is just "everything google isn't," just don't put "google" in your domain name. You just don't want to try to pretend like you *are* google or somehow tied with them.

Unless your website will become really big, you won't have any problems.