y'know

"Y'know, I was going to fix that truck this weekend"
"People in this world have gone crazy, y'know?"
"I'm not very good at public speaking, y'know. Like I get nervous y'know."

Are these sentences sounded familiar to you? Are you saying this filler word - you know - too? To be honest, I do include this expression into my speaking to sound like a native. It was not until I read a grammar book yesterday that I realized I picked up a wrong English term.

You know is a vacuous expression that has been spreading (in speech) like the most virulent cancer for decades. It is described as one of the most far-reaching, depressing, and disfiguring conversation wherever you go.

But it was left to Barney Oldfield, a retired air force colonel, to launch a vigorous campaign against you knows. In 1997 Colonel Oldfield offered a $1,000 scholarship to the Nebraska student who submitted a tape recording of a radio or television broadcast the most you know in fifteen minutes. The first year's winner submitted a tape with forty-one you knows in four minutes, thirty-eight seconds. The next year, a fifth grader took the prize. His tape had sixty-four you know. After that, the contest had been continued for several years.

"Y'know, have you know in your conversation is not a good practice."
"I know it now! So, I determine want to toss out this inane expression."