The act of showering with 2 or more individuals to save tons of water. Started by AXE, in 2012, proposing that if everyone showerpooled for a year we could save 29 trillion gallons of water. Usually but is not limited to showering with like-minded acquaintance ...or an attractive stranger.. which could result in the next big Baby boom, or the biggest sexual transmitted disease outbreak in the history of history.
"Dude man, you should totally go showerpooling with those cheerleaders over there, you'll get wettogether, and save water"
Dad: Our water bill is outrageous, it's because our daughter showers 5 times a day!
Mom: I know, we need to find help for her. She's becoming a showerholic.
Someone or something that interrupts and intrudes upon an otherwise relaxing shower, perhaps because of an urgent need to use the shower. Especially when only one bathing facility is available.
I got showerbombed by the family dog, who was muddy from a walk.