Definition

A playful abbreviation meaning 'keep it on the down-low' or 'keep it secret'—when someone shares gossip and desperately needs you to zip it. Think of it as the verbal equivalent of a pinky promise.

Example Usage

I told my friend I got a promotion before announcing it officially: 'Kepto until Friday, okay?'

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=kepto&defid=16911275)