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A phychiatric in-patient term for a garment which is designed to restrict movement for one's own safety and/or the safety of others i.e a straight jacket. Rubix is a reference to the difficult to solve popular toy, the rubix cube
'How's Ted doing?'
'They bounced him up proper, with the whole rubix cardi and everything'

'ffffs Ted'
by HarleySlavedson November 01, 2017
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