People say that the elevator doesn't go all the way to the top or that someone's elevator doesn't go all the way to the top to mean that someone is stupid or mentally ill. I get the feeling his elevator doesn't go all the way to the top.
Too much mucus buildup in throat is most often due to excessive post nasal drip. This can be caused by allergies, flu, and the common cold. The phlegm that accompanies an infection can hang around long-term. It usually clears up within 4 to 6 weeks, but for some people the problem can drag on for months.
A buildup of mucus in the throat is often called a post nasal drip or post nasal discharge. The American Academy of Otolaryngology explains that excessive thin mucus secretions caused by irritation, colds, allergies, or hormonal changes can cause more mucus to flow down the throat.