Used at the end of a sentence as a rhetorical question. Habitual question used excessively rather than an actual question that requires an answer, with no reply anticipated.
Phrase used by the inarticulate and dimwitted as a comma and to buy time and cover their lack of knowledge of a subject on which they have decided to speak and the resulting insecurity this engenders.
It is particularlyirritating in sportspeople, presenters and commentators as they are paid way in excess of the average salary of their audience precisley to tell them what it is they mean. The unspoken assumption is that the audience are already well aware of the 'gem of wisdom' or 'fact' (or see cliche) imparted by the 'expert' and that there really is no need to pay him or her £5000 an episode to provide such insightless insights.