Dmitry Bronya is the man responsible for this incredible tattoo. It looks less like a heart or Koi fish, and more like something that'd protect you from a maniac swinging a giant blade.
I normally look at tattoos and think that while it looks cool now, in 10, or 20 or 30 year's time, it will look naff. But not this. Medieval armour has remained badass for 1000 years, another few decades won't see that come to an end.