To poke your nose into is to insert yourself into someone else's business.
If something is under your nose, you'd see it, right? It means that something is right there, in plain sight, obvious to everyone.
Sometimes we are looking for something 10 or 100 feet away and it is right at our feet and don't see it, hence, 'right "under your nose"'.Something that is under someone's nose is something that the person is seeking that is right in front of him/her.
when something irritates your nose you sneeze
It means having a prominent nose that is wedge-shaped, so it looks something like a hatchet or meat cleaver.
Brown nose refers to sucking up to your boss or to other people in the hopes of getting something good out of the deal, like a pay raise, or something that you want from the person you are brown nosing.
It is a compound of two German words: spitz, meaning "point", and nase, meaning "nose". Although the surname, Spitznas, omits the final "e", this spelling has been traced back as far as the 10th century. The name therefore translates to something like "pointed nose".
Another meaning for "smell" is "odor" or "scent." It refers to the characteristic quality or aroma of something that can be perceived by the nose.
Blocked nose
that thing that hits your nose smells weird.
You could have bumps on your nose
One nose
Bleeding at the nose.