A shower or bath related activity that espouses lesbian/homoerotic elements amongst the all-female body participating; onomatopoeia of the broken dildo that generally accompanies the women.
Guy 1: I just saw my sister go into the shower.
Guy 2: But my sister's in there already!
Guys 1&2: ...
Guy 1: Zhower time.
Guy 2: Wanna' peek?
1. A shower taken by two or more women that leads to confrontations with various levels of homoerotic behavior; portmanteau of "shower" and "zowie".
2. The sound of a broken dildo.
Guy 1: "I was talking to this girl online, and she said she gets lonely in the zhower."
Guy 2: "Dude, I know that chick! Her name's Addie!"