Giving a girl a "dirty canuck" can mean one of two things, or possibly both.
1: To whip her with a canadian flag in the same manner as a wet towel, before tying her up to fuck.
2: To use maple syrup as lube while screaming obscenities in French.
"Last night I gave this French Canadian a Dirty Canuck to make her feel at home."

"Sometimes I like to give hispanic girls dirty canucks just for the ironic value."
by Tommy_Radioactive August 29, 2014
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