Taking a shower where the water temperature is luke warm or tepid. Caused by heavy demand of water heater's supply of hot water through heavy hot water use--other people taking showers or baths, laundry or dishwasher, etc. The temperature of the water is far from invigorating or comfortable. The water is barely warm, just like horse piss.
Hal: Are you expecting alot of company for Thanksgiving vacation?
Frank: Yes, my son, his college roommate, my in-laws, aunt, uncle and cousins will all be at my house. I'll have to make sure I'm the first one in the shower, otherwise I'll have to take a horse piss shower.
When someone defecates on the penis of a sibling or cousin while getting anally penetrated, then the penis is extracted and the fecal matter is flicked off the penis onto the face of the receiver.
I gave Joanna a Kentucky Meat Shower last night after the drive in movie. I snapped a picture and sent it to my aunt, which happens to be her mother.
Similar to power nap, the concept of taking a quick nap to relieve exhaustion, but applied to showering. One takes a power shower when they have just engaged in a sweaty activity (i.e., sex or sports) and doesn't have time for a full-length shower. Usually involved rinsing down with soap, instead of shampoo, conditioner, and shaving.
"I had a quickie with my boyfriend during my lunch break today!"
"Didn't you feel gross afterwards?"
"Well, I didn't have time to take the shower I wanted to, so I just took a power shower!"