a statement some one makes to another person when in doubt or even when inquisitive about ones actions or well being. It can be thrown at the beginning of a conversation between two people as a ice breaker or filler of a sentence.
It was invented by a group in Christchurch, New Zealand.
(wakes in the morning) you are ay?... hows things?
(you know about a friends secret and you address him with) bro you are ay?.. nah you are though ay?.
(friend not well) hows things?.. you are ay?. sick orrrrr....