Feeling under the weather

Feeling under the weather: This refers to feeling ill or sick and came from the frequency of ship passengers becoming seasick in heavy weather. 

This popular phrase for been ill the dates back to 1827.  It is commonly believed that bad weather can make you sick. 

The site visitor gave his/her opinion about this idiom:  I believe that under the weather is an old sailor phrase.  When men were sick, they would rest below the deck and thus were literally under the weather on deck.

Another site visitor gave his/her opinion about this idiom:  moreover, the deck that they were under was likely “the weather deck”, meaning the most exposed deck on the ship, usually the four deck over the Seamen’s quarters at the front end of the ship or the Quarterdeck.  This is where the helm and was located, high for a good view.  Either way, if you needed to be sick, you wouldn’t want to toss your cookies where the wind could toss them back in your face, nor would anyone with you want you to do so.  You’d be firmly told two go “under the weather” to be sick