Beer
It was the accepted practice in Babylonia 4000 years ago that for a month after the wedding, the bride's father would supply his son-in-law with all the mead he could drink. Mead is a honey beer, and because their calendar was lunar based, this period called the "honey month", became what we today call "honeymoon"...
In English pubs, ale is ordered by pints and quarts. So in old England, when customers got unruly, the bartender would yell at them to settle down and mind their own pints and quarts. This where we get the phrase "mind your P's and Q's"...
After consuming a bucket or two of vibrant brew they called aul, or ale, the Vikings would head fearlessly into battle, often without armor or even shirts. The term "berserk" means "bare shirt" in Norse, and eventually took on the meaning of their wild battles...
In 1740 Admiral Vernon of the British fleet, called "Old Grog" after the stiff wool grogram coats he wore, decided to water down the Navy's rum.
Needless to say, the sailors weren't too pleased and the term "grog" began to be used to mean the watered-down drink itself. When you were drunk on this grog, you were "groggy", a word still in use today...
Many years ago in England, pub frequenters had a whistle baked into the rim or handle of their ceramic cups. When they needed a refill, they used the whistle to get some service. The phrase "wet your whistle" was inspired by this practice...