A pun by the fanbase of tokyo ghoul about the main character kaneki ken.
It means "can you not?", except from the 'kaneki' part which is usually added just for fun.

Not entirely too popular and is more known as "Ken you not?"
Person 1: "Want to go and do {insert hated action here?"
Person 2: "Uh, Kaneki Ken you not?
by Speerut May 7, 2016
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A handsome, Amazing ghoul that almost every girl hopes for! Kaneki was a weakling at first but then met a girl name risa and his life was changed forever.... though at first he didn’t except his ghoul side but then he did and that’s when he finally became the best. For some reason he got a girl named touka pregnant even though how bad she treated him. He had a kid with that girl but never got the chance to see that kid...
Oh my your as powerful as ken kaneki

I wish I was a ghoul like ken kaneki
by Ceo.anime0 September 25, 2020
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A hot ass!!! Ghoul that was first a weakling... an over powers anime character that made everyone want more and more seasons. A strong guy that could scare you with just a look. A dude that married a bitch named touka and got her pregnant🙄.... it’s the black reaper kaneki for me🤤
Oh your hot like ken kaneki

Don’t get look at me like that your scaring me like ken kaneki
by Ceo.anime0 September 25, 2020
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To pull a ken kaneki is when a weakling/cowardice character (usually the main protagonist) has taken so much abuse that he eventually just snaps and becomes a total badass.
That character pulled a ken kaneki and just massacred all those people with no effort!
by Clogen June 13, 2020
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