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It is when you don't shave throughout the month of November to help push a non-profit organization or cause.
For November 2008, I am participating in No Shave November for the Save Darfur cause.
by Mz Anonymous November 05, 2008
The act of shaving on October 31st then not shaving for the entire month of November. This includes all hair on the body. ALL HAIR! On December 1st each person in the agreement will swear whether or not they have shaved and provide at least 2 signatures from family members stating that the participant hasn't shaved all month. Whoever loses must pay for the other’s Chipotle meal. If no winner is declared then all participants will reward themselves with Thai iced teas; complete Asian cuisine lunch optional. It only becomes acceptable to shave again on December 1st.
-You ready for No Shave November?!
by Stella-Kay August 03, 2010
Not shaving for the entire month of November. Started by YouTube's Charles Trippy.
Shay: Hey Charles why haven't you shaved?
Charles: Didn't u hear it's no shave November
Shay: oh awesome
by Emilio25 December 02, 2009
A college tradition that involves avoiding shaving because it's no shave November, or usually because you're just too lazy. Fortunately, every month can be made into a no shave month.
Paul- "Dude your beard is gross, you should shave."
John- "Sorry bro, it's no shave november."

Other months:
Just don't shave January
Forget shaving February
Mustn't shave March
Avoid shaving April
by Jesus Con Carne April 26, 2010
The tradition of not shaving one's face throughout the month of November. Usually followed by Mustache Monday.
All the men in the office looked like vagabonds after No Shave November.
by Loudly December 17, 2009
The month when most men are single, because women find it repulsive for men to have pub like hair on his face.

If a woman was to make out for a long period of time with a man with a beard, it could result in beard burn.
Man- "wanna have sex"
Woman- "not until you shave that beard"

Woman- "If you're going to participate in no shave november, so will I. See how you like it"
by onetimethingg November 01, 2011
men do not have to go to the trouble of shaving their downstairs this month(only november).

ie. FYI the men who don't shave their downstairs anyways...you can use this month as a cover up if the girl your hooking up with is dumbfounded of your out of control bush.
Some Bitch was taking my underwear off when all the sudden..Bam! A big bush jumps out, and nearly hits her in the face.

Some Bitch: WTF GABE?
GABE: What can I say babe, its No Shave November.
Some Bitch: O okay..
GABE: Carry on :)
by E-bag November 09, 2009