Words whose meaning you misunderstood for a significant amount of time

[GD]

Have you experienced this sometimes? When you go about your life thinking you know the meaning of a certain word or phrase and then you suddenly discover you had it completely wrong the whole time?

My example:
So I used to be convinced that the word 'mezzanine' referred to a certain type or brand of pesticide. The buggly-wuggly on massive attack's album cover is probably what caused me to make the association:


If anyone doesn't know, this is the real definition:

mez·​za·​nine | \ ˈme-zə-ˌnēn , ˌme-zə-ˈnēn \
Definition of mezzanine
1 : a low-ceilinged story between two main stories of a building
especially : an intermediate story that projects in the form of a balcony
2a : the lowest balcony in a theater
b : the first few rows of such a balcony

now you go