"Complete absurdity" means something that is completely ridiculous or nonsensical. It refers to a situation, statement, or idea that is extremely unreasonable, illogical, or absurd. Full definition
And to complete the absurdity of the situation regarding the subject real estate trade, it was the Seller who initiated the litigation — not the Buyer's! (remonline.com)
Sometimes a situation that seems like it's devolved just into complete absurdity requires a radical, absurd response — and that radical, absurd response might in fact be more sensible than even the thing it's responding to. (relevantmagazine.com)
Still, that being said, at least Anchorman 2 knows what it is and revels in it with complete absurdity when possible, which is uncommon nowadays. (rottentomatoes.com)