Knock the stuffing out of (one) phrase
To cause someone/something to lose confidence, energy, or to become weak.
The explosion had knocked the stuffing out of the building's foundations.
Listen, John! Don't let this defeat knock the stuff out of you.
Losing several games in a row had knocked the stuffing out of the team.
To destroy one's plans or ideas, often by doing something better than them
To deteriorate.
To do something difficult.
The verb "knock" must be conjugated according to its tense.
This phrase dates from the late 19th century, from the allusion of draining someone of their inner resolve.
This phrase is used to describe something very modern or updated or something that no longer looks like what it's used to.
It has been a long time since I left my high school, and now I have to admit that it's certainly not your father's high school anymore.