During the early 2000's a name given to the Bradley Fighting Vehicle by US Marines and Soldiers in honor of Army Lieutenant Commander BrettMichael who was KIA in Kandahar Province.
Either liquid niquil or any liquid drink with melatonin, Ashwaganda or other sleeping aids in a liquid form. If warm tea helps you get to sleep that could be sleepy juice too.
I could not sleep so I chugged some sleepy juice and now I'm so tired and sleepy.