1) A person who don't give no fuck.

2) A person who kills stoners.
"Shit dude, look at Johnny over there, he's a stone killa'."
"Yeah dude he dont give no fuck!"
by Bob & Shin October 20, 2006
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When and idiot tries to sound hard as fuck. Referring to himself as legitimate serial killer of all things that are living. He who is not a stone cold serial killer, is in fact a cold stone cereal killer.

Someone who has never seen a horror film.

Someone who still eats cereal for breakfast. And ice cream before dinner. If their parents allow.
I'm going to slay trout on the river cuz I'm a cold stone killa
by yngceo October 1, 2015
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