sick as a dog

Miserably, thoroughly unwell

Sick as a dog means severely ill, especially with nausea or vomiting.

The phrase emphasizes misery rather than any particular canine ailment: I ate something bad and was sick as a dog all night.

It's informal and slightly old-fashioned but still common.

Opposites
health condition

sick as a dogfit as a fiddle

In excellent physical condition

in the pink · healthy as a horse · hale and hearty · right as rain · thriving

functionality/capability

sick as a dogfull of beans

Very lively, energetic

bright-eyed and bushy-tailed · raring to go · on top of the world · firing on all cylinders · energetic

Family

dog, sick, sickness, sickly, dogs, dogged, sickening, dogma, sicken

Familiarity
Top 50,000
Profile
Known to kids · Used worldwide · Timeless · Negative · Everyday, not technical · Rated G