flat on one's back

Prostrate and helpless

Flat on one's back describes lying down facing upward, typically because of illness, injury, or exhaustion.

The phrase emphasizes helplessness or incapacity: The flu had me flat on my back for a week.

It can also describe being knocked down: The punch left him flat on his back.

incapacitated

bedridden

Unable to leave mattress

laid up · confined · disabled · paralyzed · sidelined · out of commission · pinned down · knocked down · floored · grounded

recovering

convalescing

Healing after sickness

mending · rehabilitating · on the mend · taking it easy · doctor's orders · bed rest · sick leave · getting better · restoration · therapy

Opposites
body position/posture

flat on one's backstanding upright

upright · standing · erect · vertical · sitting up

physical capacity/health status

flat on one's backup and about

Mobile after rest

fit as a fiddle · hale and hearty · in fine fettle · in the pink · fighting fit

agency/activity level

flat on one's backup and at 'em

Morning call to action

on the go · in action · in the thick of it · back in the saddle · in full swing

Family

flat, flats, flatly, flatten, flattens, flattened, flattening, flatter, flattest

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G