In southern regions, a conjunction of the words 'you' and 'know' - typically used either at the beginning of a sentence when either stating a fact or opinion, or to begin a question. Also used at the end of a sentence, when looking for confirmation that the listener understands or agrees with the statement.

A filler word, inserted in oral speech. Similar words include like, just and and stuff.

A filler-word used in speech, especially when one is nervous. Used often by guitarist Billie Joe Armstrong in interviews.

Can be replaced with like, and stuff, um and sorta.

A word which was made up and created by Paul McCartney, before him there was no sound but he fixed that and when someone asked how he did it he answered;
"Well, I was sleeping y'know..."

Since then it have been a word used in everyones everyday life y'know.

A phrase uttered by select persons every ten seconds. Akin to "ummm" which is used by many people. AKA, a filler phrase.

Has recently become an over-used preface to completely unrelated following statement, typically used by stiff, grey people in a self-defeating attempt to appear individual or at least interesting. Fail

short version of "you know what they say"
(This phrase however is said with nothing after it)