A grand criminal scheme in order to make enough cash to retire. Often used in the show "Trailer Park Boys".
Julian : Ok boys I gave an idea thats better than the big dirty.
Ricky : There is no way were not doing the fucking big dirty Julian. I wanna retire on the spot.
by Who is LMFAO June 3, 2018
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1. An ex Boyfriend/Girlfriend that will never leave your thoughts.
2. The one emotional relationship that you never fully get over. Often, this relationship is one you will compare new relationships to.
Sure she's pretty, but she's not as pretty as The Big Dirty was.
by MaWilliams September 4, 2010
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A bar located in Waterloo Ontario, CA. More commonly known as "Phil's Grandmothers Basement". An establishment that serves cheap alcohol, while also having a rather charming aroma of vomit and B/O. One a the few first bars in Canada to adopt the "the bathroom is where ever you feel like it" mentality. A phenomenal place to meet people for the type of encounter that wont last the next morning.
Q: "Hey man what are you up to tonight?"

A: "Nothin' much just headed down to the big dirty for 1 or 9 beers."
by Phanfan February 7, 2010
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A large criminal plan. Usualy organised while spending time in jail for another crime.
"I got this plan for a big dirty after I get outta here"
by zoobtoob December 8, 2006
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An enormous and/or monstrous poopie that is taken in the morning after a long days digestion.

To best encourage a successful Big Dirty one must recite "Big Dirty" multiple times. How loud one can say "Big Dirty" is up to the speakers discretion. This repetition can also be used to invite others to perform a successful Big Dirty.

Reciting "Big Dirty" can also be used to set an uncomfortable tone in any crowded restroom, public or private.
Stall 1: "Big Dirty, Big Dirty, Big Dirty"

Stall 2: Inhabitant leaves the restroom due to uncomfortable atmosphere.
by The Big Dirtier November 13, 2010
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Something so awesome and cool, yet gross and greasy.
"Dude, that body suit is old and smells funny..." "WHATEVER, ITS THE BIG DIRTY"
by Nazzy Man and EChris December 13, 2009
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