Definition

Abbreviated slang for 'that ain't fair'—a quick way to call out an unfair or unjust situation. Pronounced like 'daff,' it's the text-speak version of a complaint.

Example Usage

You got an extra fry in your order and I didn't? Daf, bro.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=daf&defid=992263)