A concoction used to cleanse one's scalp. Its ingredients consist of:

1 part sham
1 part poo
Dang, I wish Greasy Gary would use some shampoo.
by Wojeezy May 24, 2008
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A fake turd.

Derived from combination of sham and poo.
I thought the dog had managed to crap in the bathroom cabinet, but it was just shampoo.
by Pipe Downn March 21, 2010
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A liquid substance used by everyone, excluding those too poor to afford it, rednecks (they use soap instead), and the French (they hate showering).
Normal person: Shampoo is a part of my showering routine.

Poor person: I wish I could afford shampoo.

Redneck: I'm too much of a man to use shampoo.

French person: Je déteste pour verser. Je déteste le shampooing.
by Johnny Rocketfingers July 10, 2003
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The word’s origins come from sham, French, meaning false or fake - and poo, slang, referring to biological excrement more commonly referred to as “shit”. Thus, one can only assume that shampoo is “false excrement” or “fake shit.”
Examples of shampoo include: Prell, Clairol, Nioxin, Suave, etc.
by nethcev! August 23, 2006
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"Win, Buffy, Muffy and I got totally bombed on Shampoo last night, and then we played hide-the-salami"
by Jeffrey March 25, 2004
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shampoo, noun.

A codeword to say around the office that will not arouse suspicion (dl), to alert your coworkers that someone of importance is in the room; time to close the poker / pr0n.
I'm top 30 in the freeroll and some fucking shampooo walks through the door.
by og October 27, 2004
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