Not sure, but I’d have “CUT HERE” and a dotted line tattooed at the point where it was amputated.
Different Susan, but I’d think of you too, dear. 
No user serviceable parts inside.
The Salmon of Knowledge. No idea where I’d put it though.
A crop circle pattern. If anybody asked me what it meant, I’d say, “No services this exit.”
The Millennium Falcon on my face.
I don’t have any tattoos but I would probably get one if my wife dared me. Same for her probably. Anywhich, I’d probably get a Turks Head knot as a band on my upper arm.
The word “TATTOO” in big black block letters across my chest.
I can think of only two scenarios in which I must get a tattoo:
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Lisbeth Salander has me tied up, I doubt if I would have options.
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Before getting into the cattle car, I think it would just be my number on my forearm.
A luna moth or maybe a buckeye moth.
I wonder if they’d disallow that. The coolest tattoo I’ve seen a picture of was a scorpion done in UV ink.
Not being particularly cool, myself, I might choos a 1" white ink doily. I’d put it wherever the skin is least sensitive. Cause I know that there are places that hurt more and places that hurt less.
Likely to never get one, but for the purposes of this thread, my choice would be easy: either one guitar, or perhaps a couple with their necks crossed in an X, mostly likely on a shoulder.
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One would be this jazz archtop(I am not a jazz player, but have one of these and think they are pretty much the most beautiful guitar design ever)
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And the other would be either be:
> A Gibson J-45
> A Martin D-18
> or a Blackguard Telecaster with a humbucker in the neck position, like Keef’s guitar Micawber - I made my own Tele with this type of set up.
These are my favorite guitars, and guitars have been my friends and my bartender to tell my troubles to for decades, so if I had to get a tat, I would definitely go with them.
A little bloodtype graphic on my inner arm.
slide rule on penis
I’d get one to overlay the big spider vein on my leg–maybe a tropical vine or a snake.
If I had to get another tattoo, I started with filigree hearts in the favorite color of my loved ones who have died. Actually, I plan on doing that anyway at some point.
The SS guys had it tattooed on their shoulder. An arm could be blown off in combat.
A radial evolutionary tree of life.
Lucky for me I’m not in combat.
Or, you know, a Nazi. 
I know a guy with a butt hole ( very well done… don’t ask, ) just above his real one.
If I had to & it has to be visible most of the time, ( as asked by the OP ), it would be a soccer ball on the back of one hand.