Technical debt is a indefinable quantity which makes it very prone to be abused to mean "I wish I could rewrite this in [insert some fashionable language, framework or coding style]".
AI slop is an easier concept to quantify. It's basically the code for which insufficient people in the organisation have a meaningful understanding of how it works or what it does.
> It's basically the code for which insufficient people in the organisation have a meaningful understanding of how it works or what it does.
Its connotation also includes being vastly larger than needed for the purpose it serves, _if_ there is even any purpose.