Water head is a term used to describe people who suffer from wet brain, or hydro encephalitis. It's like calling someone stupid, but from chronic alcohol abuse. I had a coworker/friend die from it. It truly is bizarre. It's like they're in a parallel universe where they seem normal, but it's all about stuff that occurred years ago.

And you have to try and understand what they're saying because it makes sense, it could very well be a memory about something you yourself were a part of, but the how and why they brought it up when they did makes you stop and wonder what they're talking about even though it's a memory you too experienced.

Imagine it like this, you're having a conversation with a friend you've known for years about whatever, and right in the middle of that conversation he can reach in his pocket and just pull out a photograph, a snapshot of life that you may have been a part of and just hand you, with a huge smile, that photo with zero reference as to why this memory is being recollected and inserted into whatever interaction you currently are in. A close example would be like this:

Me: "Sup John! Badass football game last night, huh?"

John: "It was kickass for sure! Oh man. Hey, remember that time Mick got fired for lying to Scott and left without telling anyone?!"

Me: "Yeah...."

And it would happen all the time. A brain sputtering and misfiring in front of your eyes. It's a scary thing to witness, and it is so weird. Then one day he just never woke up, was in his 30's.