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The act of fucking a girl in the mouth, making her gag until she throws up, and continuing to fuck her vomit-filled mouth. The dirty, gross substance in mouth is a reference to the dirty, gross substance in the famous Halifax harbour.
"Did you hear last night buddy gave his wife the Halifax Harbour?" "Yeah dude, but she's bulemic so I'm sure she's used to it."
by TheDewd November 21, 2006
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