The state or quality of being heavy: in the various senses of the adjective; esp. Oppressed condition of the body, members, or senses; torpor…

Heaviness, sluggishness (of bodily condition). Obsolete. rare (a Latinism).

the slows. colloquial. A tendency to move or act slowly, sometimes humorously imagined as an ailment; slowness. Frequently in to have the slows.

(A feeling of) vague, non-specific physical discomfort; absence of the sense of physical well-being.