Definition

An acronym standing for 'Classless as F—' used to describe behavior that's shockingly rude, tacky, or socially inappropriate. It's a quick way to say someone has zero shame or filter.

Example Usage

When she started demanding larger donations from guests at the fundraiser, I leaned over and whispered, 'Wow, that's CAF.'

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=CAF&defid=16216760)