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1.
A phrase or an insult meaning one of three things. One being to actually pee off a cliff, two, being to make a cliff mad, or formally to piss off, but off a cliff.
Nik: Piss off a cliff.

Andrew: What should i say to piss it off?

Christian: Why would i piss off a cliff when i can piss in a bush?

Nik: No piss off. Jump off a cliff.
by Dig_Life August 24, 2011