I have a list of halachic terms that disturb me by their vagueness and ambiguity, and lack of clear definitions. They are sometimes liberally applied, and sometimes not applied when it looks like they should be.

I added a term to the list last night...I actually never compiled a formal list, but when I stumble across such a term I think about it.

The newest word to make it to my list is "Yohara". This term is used in halacha in the sense that there might be a certain action or opinion that when followed, one would be accused of acting with "yohara" meaning haughtiness.

The context it was used in last night was in regards to tzitzis. The Mishna Berura quotes a Beis Yosef that says that one who makes two holes in the corner of his garment is guilty of yohara. Ostensibly, this would be because he is trying to fulfill even the opinion of a minority view when it is not necessary. But nowadays we do that all the time (try to fulfill all opinions, even thos eof minority viewpoints), so why is that a big deal or why are we not guilty of yohara all the time?

Another time this term is used is when covering the head with a tallis for davening. If I remember correctly, the shulchan aruch says that talmidei chachomim cover their heads with the tallis during tefilla. Others who do so are guilty of yohara. Yet nowadays almost everybody in religious circles (and for sure in chareidi circles) does so. Are they not all guilty of yohara because they consider themselves talmidei chachomim when that is not necessarily the case?

When do we apply this? when do we not? why is this ever an issue?

this can be added to another term: "tircha d'tzibbura"

I know I have more, but off the top of my head I cannot think of any...

What halachic terms do you know of that bother you like this?