Green’s Dictionary of Slang

(US drugs) of a drug addict, to fake a fit.

1938		D. Maurer ‘Lang. of the Und. Narcotic Addict’ Pt 2 in Lang. Und. (1981).
1969		R.R. Lingeman Drugs from A to Z (1970) 242: toss out To feign withdrawal symptoms in order to obtain narcotics from a doctor.
1971		E.E. Landy Underground Dict. (1972).