Used to describe someone who becomes oblivious to their surroundings because they are listening to their mp3 player or iPod too loudly.
Friend 1: Hey man, I just got totally ignored by the guy who sits next to me in Biology.

Friend 2: Don't sweat it. He was probably just plugged in.
by damnteenager May 16, 2009
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A symbol that the party is about to start.

Always accompanied by a motion. Start with fists clenched and arms parallel to the ground out to the side of your body. Then, bring your fists together in front of your body at a 45 degree angle with the ground.

You will be making the motion of grabbing two extension cords and plugging them together, so that the music/fun can start.
"You guys ready to get this party started?"

"YEAH! PLUG IT IN!" (Use the motion described above!)

PARTY!
by Puglas April 15, 2005
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President Obama said we should have 1 million plug-ins on the road by 2015.
by z21 January 26, 2011
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Adjective. A word used to describe someone who is completly and entirly useless.
by BMOUNZ May 2, 2005
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A word that refers to an ice hockey player who is the useless part of the team. He is the "orange cone" on the ice. Always in your way and never does anything to help your team win.
Brian never helps the team, he's such a plug.
by Sniper9 September 8, 2009
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The anal administration of any drug. Most commonly done with MDMA, DMT, or 2cb
Plugging DMT is an effective way to skirt using an MAOI to achieve an ayahuasca like high which is less intense but much longer lived than vaporizing it.
by Rimjob Jesus February 4, 2010
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