When a person is seen to being 'up-to-no-good', they are clueless and have performed something random. The act performed by someone is not required
scenario 1: That dude over there is a bit "up-ta-fucks" ay.
scenario 2: Your essay looks a bit "up-ta-fucks" mate.
scenario 3: His style is "up-ta-fucks" hard ay.
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