So a bit like 'yeh' or 'you know what I mean'.
As used in colloquial BrE.

e.g. 'I was minding me own bizness, yeh, and this guy just stops me, you know what I mean.'

Then you reply with "I know what you mean"?

its mostly idiomatic. try to fit in after language class. even a chinese may have a hard time if he is new in town.

haha its very funny!