Another meaningless utterance that irritates me to hear is:
Ya' know

A carry-over from the early '80s it is overused/misused/abused far too frequently.

My mother-in-law peppers her speech liberally with this phrase:
"I was talking to Karen, ya' know, and she told me she went out to what's-his-name to get, ya' know, another thing for her, ya' know."
And on, and on.

Saddest of all is that, after a telephone conversation with her, my dear wife will carry the (bad) habit in her speech patterns for several hours!

Ya' know what I mean?

"I am certain there is too much certainty in the world" -Michael Crichton