Top Definition
the act of two indivuduals venturing into two adjacent stalls in a bathroom to simultaneously deposit fecal matter in sync, and also discuss with each other the matters of life.
While co-piloting Matthew and Thomas were able to express their feelings regarding their views on the condition of each others bathroom stall.
by MTAHTOTMHAESW February 18, 2009

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When a passenger holds the wheel for a driver while he is lighting a bowl, bong, bubbler, joint, or any other smoking apparatus usually for marijuana
Yo bro want to co pilot for a second while i spark this bowl
by Admiral_Ackbar November 09, 2008

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similar to wingmen, when two guys go to a bar and they help each other hook up with desirable girls. In biology this would be similar to a mutualistic relationship in which both organism benefit each other.
Steve and Tom are going to a bar but they are copilots instead of wing men so neither of them will have to flirt with a fat chick to help the other hook up with her hot friend.
by sarge3562 August 03, 2008

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When you are peacefully taking a shit in a public or workplace bathroom with a row of stalls and someone comes in and takes the stall right next to you.
Zach was droppin a duece at work, reflecting on his day, when Jeff came in and copiloted him.
by yerboy319 April 06, 2011

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an amphetamine tablet
I don't need a copilot to carry in my luggage just because I didn't get much sleep.
by The Return of Light Joker July 27, 2010

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When one gay man jacks off another gay man. Usually misconceived as another mans best friend.
Wow my copilot helped me so much last night!!
by MaTtIe GeE February 20, 2011

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A friend who sits shotgun and helps you watch for cops, rolls joints and flags down bitches when you're out cruizin the strip.
I need a co-pilot for this trip.
by Bomni February 08, 2005

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