I love the word "proverbial", however a lot of the references about it elude me. What do people mean when they say "proverbial hat?" Also, what are some common usages of proverbial? Do you ever use it? I want to understand the term better basically. Proverbial hat, proverbial foot, proverbial that, proverbial this... I think I'm getting the proverbial headache.

Help, wordsmiths!

Your servile servant,

Logwood