Definition

An exclamation that triggers a call-and-response from people around you, where they echo it back in unison or individually. It's the verbal equivalent of a group nod.

Example Usage

Person: AY! Group: AYYYY! Person: AY! Group: *crickets* Person: Well, that fell flat.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=ay&defid=2110052)