Question: what is that specific word for the habit of repating the same word again and again? like if someone speaks and after everyline if he says like, like or ok,ok or lets say,lets say what you call for that kinda repeat? I am sure there is a word for that?

Answer: Redundant-occurring over and over; needlessly wordy or repetitive in expression.  So if someone you know talks like that to you...just tell them "Hey, stop being redundant!"
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