jackernaut
A jackernaut is someone who can take a ton of damage and still be a pain in the ass. They’re like a robot with a attitude and a bulletproof vest.
"I got hit by a rocket and still killed me. I’m a jackernaut.", @RocketNoob
"He got shot 5 times and still ran me over. That’s a jackernaut.", @BulletBoy
"I took 10 grenades and still kicked my ass. I’m a jackernaut.", @GrenadeMaster