To disregard, discredit, or
disrespect.
Throwing dirt on someones name.
*Though used in Canada, it is not only Western Canadian slang. It is used commonly in the US ranging widely from NY to
California since the late 70's (if not before that).
It is also a popular word in the U.K.
Me: What happened to your eye?
John: Mikey and I got into a fight over Cecilia and he snuffed me
in the face.
Me: Wait, what? Cecilia that girl you've been dating?
John: Yep.
Me: Wow and he was
supposed to be your homeboy too... Damn you were dirted hardcore.
John: I know he
shitted on me, but paybacks a bitch.