john is kill means in slang: This means that John Lennon has died. Alternately, “John Lennon is dead” can be used to substitute for “john”. The thread “john is Kill” originated on 4chan. It was an assumed title of a thread discussing the assassination John Lennon. This thread appeared to have been written by someone who had very poor English skills and used it for comic effect. The OP wanted to know where people were when John was assassinated. The thread can sometimes be recreated with the same John picture and the same format. However, Heath Ledger may sometimes be used in place of heat ledger as it’s typed to homage the poor English spoken by the original OP. (in Slang Dictionary, added by Eddie Tate)