A common mispelling of Fuck, caused by the fact that the letter J is next to K on a typical QWERTY keyboard, And that the user may not be quite a good a typist as they thought they were.

It may also be possible that the user is illiterate.

It's like Fuck but a little too far to the left

A common misspelling of the word "fuck" albeit with a more dark side to it.

Fucj dates back to ancient Celtic times and was a word said during orgies more primarily bloody violent orgies.

A common misspelling of the word fuck for people who use smartphones.

An iteration of fucking used when you can't type

It's like fuck, but better!