An occurence by which a person is beaten about the head and shoulders with a nightstick or other wooden club.
by CrowTard March 26, 2006

by Alex Stockwell August 3, 2007

Known in scientific terms as 'Shampupicus Abushulance". It is when a shower cap is pulled over an unsuspecting victim, who is then squirted with shampoo, and then scrubbed verociously with toilet bowl scrubs. This is known to happen to people who refuse to shower.
"Did you see that Seth kid today? His hair was like a mirror!"
"Yeah, we should totally shampoo ambush him..."
"Yeah, we should totally shampoo ambush him..."
by The Forrest Fire September 23, 2007

by goofyeedam456 July 24, 2022

the occurrence of multiple shampooings or washing body parts during a shower because you get distracted and forget what you've already cleaned.
Writer: I had a great idea for a book this morning in the shower, but it led to a three round shampoo loop.
Friend: I hate that!
---
Wife: You used all the hot water!
Husband: Sorry, I got stuck in a shampoo loop.
Friend: I hate that!
---
Wife: You used all the hot water!
Husband: Sorry, I got stuck in a shampoo loop.
by bomt April 19, 2010

by asorethumb March 30, 2010

A residual drug or alcohol phenomonon in which, during a period after a heavy binge, only a small amount of the recently-abused substance is needed to re-activate your buzz. So named after what happens in the shower when you "rinse and repeat": only a tiny bit of shampoo is needed the second time around to achieve a full sudsy lather.
"Man, I've only had one bloody mary and I feel buzzed!"
"Shampoo effect, dude. You were blasted last night."
"Shampoo effect, dude. You were blasted last night."
by Soave May 25, 2005
