Punding

Punding is a term that was coined originally to describe complex prolonged, purposeless, and stereotyped behaviour in phenmetrazine and chronic amphetamine users, by Swedish forensic psychiatrist G. Rylander, in 1968. It was later described in Parkinson's disease, it has also been described in methamphetamine and cocaine users, as well as in some patients with gambling addictions, and hypersexuality.