No euphemisms here:
I’ve never heard ‘totally lawnchair’; Google seems to return only one relevant result. It just seems to be a rando phrase meaning crazy (whereas ‘rando phrase’ has numerous Google results).
The term I hear most often is ‘completely hatstand’, which also means crazy. Probably originating in Viz, (q.v.).
Don’t see too many bomb-sniffing teeth.
It’s not exactly an alternative name for a product, but in television commercials, all bodily fluids are blue.
Sort of in the ballpark, I guess.
Not the commercial for Oops I Crapped My Pants!
(I know it’s a fake commercial but it gave me an excuse to share it.)
Gee … you shouldn’t have! 
Execellent. So, I’ve made up a new yet still somewhat undefined espression, then.
I will arbiter “totally lawnchair” to mean, then: obstinately not giving a shit, as well as rejecting something out of ignorance, paranoia, and a pathetic mourning of things no longer what they used to be.
Capped off by impotent grumbling, maybe something thrown.
As a woman with arthritis anything I have to screw off the lid. My grown He-man macho roommate has had trouble on occasion.
OK Boomer.
JK, I are one too. 
Just not one who’s obstinate, uncaring, ignorant, paranoid, pathetic, nor impotent. And not a grumbler neither. Neener neener !
But seriously I think you’ve got a fine meme there if we can get it log-rolling enough to catch on.
I sold real estate and was a Realtor, but knew all you needed was a license to sell property. Anyway there was a real estate talk show host that week after week kept telling listeners only a Realtor could sell real estate, I finally called the show to challenge him but they wouldn’t let me on the air.
A dog could also be a tooth.
Sorry, what’s the “alternative name” here?
My Denim, jean jacket, when I was a kid, was made from old denim jeans. So either way was correct.
I must admit, ‘totally lawnchair’ makes me think of this guy.
You guys missed this whole thing. He’s talking about the thread, as in it’s a good thread so he is pulling up a lawn chair to enjoy reading it.
That’s my story and I’m sticking to it
Hope he brought popcorn! 
Well, points for a positive outlook, I spose.
And with popcorn - meh - I prefer absinthe in its stead.
mordecaiB, did you read where we gave Guest-starring_Id some options on “totally lawnchair” AND HE EXPLAINED IT?
“You can’t move me, I’m so set in my ways… that I don’t care about your response.”
In my family, it was pronounced “Wustershearshireshauce.” Everyone knew where in the refrigerator it lived.
Dan
Oh.
My.
Bloody.
God.
wuh’-stir, no?
/not a Brit