You mean when someone uses words in the middle of their comment without apparent neccesity or reason? Such as : you know this, you know that... you know, you know, you know, you know... and YOU KNOW... or like, like, like, like, like, like ... and the classic "you know what I mean" , or "sort of", etc. Yes, I think "verbal tic" is the term you are looking for .
^^