peusyhtälö
Peusyhtälö, also known as the Peus equation, is a term in Finnish often used in casual conversation to describe a situation where something is perceived as being of surprisingly low quality or value, especially considering the effort or cost involved. It's not a formal scientific or mathematical term but rather a colloquial expression that highlights a disappointing outcome.
The origin of the term is somewhat obscure, but it is believed to stem from the Finnish
For example, someone might use peusyhtälö to describe a poorly constructed piece of furniture that fell apart