Green’s Dictionary of Slang

(drugs) the craving for food that affects a heroin addict once they have withdrawn from using the drug, which, on the whole, destroys the appetite during its regular use.

1949		N. Algren Man with the Golden Arm 207: Wait till the applejack is ready [...] that’ll kill the chucks every time.
1953		‘William Lee’ Junkie (1966) 40: After eight days I got the ‘chucks’ and developed a tremendous appetite for cream puffs.
1972		E. Grogan Ringolevio 63: The chucks, an enormous hunger which addicts experience in the last stages of withdrawal.
2001		ONDCP Street Terms 6: Chucks — Hunger following withdrawal from heroin.