When a scene or event is of such high eroticism that a full erection cannot be achieved due to the sheer scale of it.
That movie was so hot, it had a debonerization effect
Waiting for a raging erection to become flaccid by either waiting alone in a separate room or sitting down before facing other people.
Peter debonerized his morning-wood before facing his in-laws.
Alfred sneakily Googled pictures of Chloe Kardashian on his iPhone to help the debonerizing process before standing up.
"Well, John, I guess we should head home now."
"Hold on, babe, I have to debonerize."