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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 04, 2010
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3
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 06, 2010
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4
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.
via giphy
by Who is LMFAO June 12, 2018
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