A girl or situation that will quickly reduce an erection to its normal state.
Susan is a total lumberjack.

I was ready to go when my mom walked in. I got lumberjacked.
by theGinganinja41 March 9, 2010
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lumberjacking is a taking a poop. cutting butt logs.
"yo we got to go!"
hang on I am lumberjacking.
by Ryck Dalvengyr August 4, 2014
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Two naked, erect men stand facing each other with their penises touching, head to head. Both men grab the unified boners with both hands, put the fists together, and move them back and forth as a single unit as if sawing down a tree with a two-person saw.
Man, I think Dave gave me a rash from too much lumberjacking last night. We should have used more maple syrup...
by RealEthoboy January 16, 2009
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It is to have sex while wearing a fake beard or real beard and only flannel. Using Maple Syrup and Bacon in the sex is optional though full recommended to get the full effect.
I only like it having sex with Johnny when we are Lumberjacking.
by Nwordisawesome August 31, 2010
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This is when a man masturbates over someone's sleeping face, and, after ejaculating on his/her face, he would proceed to trim his pubic hair over his/her face, now sticky with drying semen. Therefore, the falling pubic hair, freshly trimmed from the man's genitalia, would stick to the person's face, hence giving the person a "beard", of sorts, similar to a lumberjack's.
Person 1: Man I tried lumberjacking my girlfriend, and she filed a restraining order against me.
Person 2: That slut. Don't worry about it, she's not worthy of a beard anyway.
by MadCow789 April 5, 2015
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Another term for "cock blocking" except the offending person, or item is actually "killing your wood" because it is distracting you and/or so repulsive you could not possibly be aroused while you are thinking about it.
Dude, I love this truck but the purple color is totally lumberjacking my game.

Did you see her ugly friend? As long as she was around she was lumberjacking me while I was hitting on the hot one.

We were eating at this fancy restaurant, but watching her eat snails totally lumberjacked me
by TommyGunz519 September 18, 2011
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The lumberjack is a sexual finishing move, wherein a man is having sex with a woman doggie style. When the man is ready to finish, he wraps his legs around the woman and begins to chop her in the kidneys as though he were trying to chop down a tree. The goal of the Lumberjack is for the man to hang on until he finishes inside of the woman, while yelling "TIMBER!"
Eric was feeling especially kinky one night, so he decided he would pull the Lumberjack on Megan and chop that bitch down.
by Bob Iveson November 9, 2006
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