I can't find it right now
but there's a qwantz comic where t-rex says that he's going to get a tattoo on his hand that says

TO DO:
get tattoo

be awesome
( gronkpan MUSICIANS! www.zombiemoonrobots.com, Fri 18 Apr 2008, 16:12, archived)

I have no tattoos or piercings as I see it as a form of self mutilation
but if I'd had this idea before a webcomic I'd totally get that tattoo.
( gronkpan MUSICIANS! www.zombiemoonrobots.com, Fri 18 Apr 2008, 16:13, archived)

Wait, here it is
www.qwantz.com/archive/001194.html
( gronkpan MUSICIANS! www.zombiemoonrobots.com, Fri 18 Apr 2008, 16:15, archived)

ahahahaha

( Cockweasle Snarn, Fri 18 Apr 2008, 16:22, archived)

I had a bet with my mate that if I ever win more than £1,000,000 on the lottery,
I'd get a tattoo of a calculator watch on my wrist.
( Cockweasle Snarn, Fri 18 Apr 2008, 16:18, archived)