When someone prevents you from getting an erection, or does something that completely turns you off.

Just like a lumberjack cuts down a huge tree, it can be compared to someone killing your wood

Similar to a cock-block but worse; it could ruin several moments instead of just one.
Bro1: " Dude, last night my roommate walked in on my girlfriend and I making out. The date was ruined and now my girlfriend is afraid of my roommate walking in on us."

Bro 2: "What a lumberjack!!!!"
by MonotoneJoe November 25, 2010
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Whilst Double Penetrating a girl, The dick in the ass goes in as the dick in the pussy comes out. Like the old school saws that the lumberjacks used back in the day.
Dude, last night, me and my homeboy were totally lumberjacking that bitch. We had her screaming everything with our perfect form!
by Spcmmr January 3, 2011
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When you are in the process of tea bagging someone, you pause for a moment with the balls resting on the face. You then hold the penis (still soft works best) up in the air and yell "Timber!" Then proceed to let shaft fall onto the persons face, preferably with a distinct smacking sound. For additional amusement, perform this while executing the ballnoculars, or the Gonzo.
My girlfriend was already angry with me last night, so I figured I may as well tea bag her with a couple of lumberjacks thrown in for good measure.
by helpy helperton February 17, 2012
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Someone who handles wood all day(penis). a.k.a someone who is gay
Wow, danny is such a lumberjack.

Hey mom, i think daddy is a lumberjack.
by Jay E October 21, 2006
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A game with similar to Bloody Knuckles in that fact that people take turns inflicting pain on one another. In lumberjack, one person slaps the back of another person's hand. Then the other person slaps the first person's back of the hand. This continues until one person calls for "mercy" or whatever the end word is, or until a teacher or adult or respected authority tells you to knock it off. Some people cheat while playing Lumberjack and after they can't take it anymore, wind up for their turn, but instead of hitting their opponent's hand, they slap the opponent across the face and run like hell. In some places Lumberjack is known as Slaps. Also, sometimes people use thick and heavy pens or rulers instead of their hands.
Me and Pete play fifty rounds of Lumberjack everyday to see who is the stronger man. One day though, he took his turn by whipping out a thick diameter'd pen and whacking me with it before I could react. I pretended to take it in good humor. Then for my turn, I wound up and slapped him across the face and kicked him in the balls and ran like hell. The next day at our scheduled playing time (12:07 P.M.) we apologized for our wrongs and decided only to play on Tuesdays.
by I listen to Indie Music January 26, 2007
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A gay man who behaves straight, as in Monty Python's famous sketch, "The Lumberjack Song."
"Don't let his flannel shirts and stubble fool you. He's a total lumberjack."

"No! I thought he was straight!"
by FreeLuv November 15, 2004
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A harshly given wedgie where one person grabs the back of the victim's underwear and one person grabs the front of the victim's underwear. They then proceed to yank back and forth with great force until the taint is rubbed raw.
Joe kept smarting off, so we gave him a lumberjack to shut him up.
by Tude November 28, 2006
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