A fecal streak in your tighty whities of such width, depth and color that it resembles the tail of a beaver.
Although I wiped until my ass was sore, I still had a beaver tail in my undies at the end of the day.
by Lord Blackstone March 31, 2015

by sara p January 17, 2009

n: A large gathering of Lesbians
Guy 1: (standing in line at the bar) What is the hold up?
Guy 2: Oh, God! There's a beaver dam ahead!
Guy 2: Oh, God! There's a beaver dam ahead!
by narwhalbattle March 13, 2011

Bohdan: I hear that slag has a beaver tail.
Dr.honey: Oh shitfuck really?!
Bohdan: ... wanna ask if we can see?
Dr.Honey:HELL NO!!!... yeah kinda.
Dr.honey: Oh shitfuck really?!
Bohdan: ... wanna ask if we can see?
Dr.Honey:HELL NO!!!... yeah kinda.
by Dr.Broseph July 8, 2009

what all old people and people think Justin Beiber's name is, people who have not yet been exposed to such high levels of faggotry.
Grandfather: Whos this little girl singing?
Teenager: Thats justin beiber
Grandfather: Justin Beaver?
Teenager: Thats justin beiber
Grandfather: Justin Beaver?
by NAHH SUN SIT DOWN August 12, 2012

The beginning of vaginal intercourse. Most commonly used to refer to a male who has been cock blocked.
"Yo! The door was open, so I came in. Can I crash at your place tonight?"
"Dammit Bob! I was Justin Beaver!"
"Dammit Bob! I was Justin Beaver!"
by Trogador April 5, 2010

When someone intentionally or unintentionally prevents a woman from hooking up with or having sex with another person. The female equivalent of being "cock blocked".
I saw this really cute girl and my friend introduced me as her girlfriend when she meant her girl friend. She was a beaver dam.
by Tree303 November 9, 2013
