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Definitions

sick as a dog

ADJECTIVE
ailing
Synonyms
STRONGEST
diseased feeble ill sickly weak
STRONG
debilitated down enfeebled indisposed sick wasting
WEAK
below par down with feeling awful rocky run down under the weather unwell
Antonyms
STRONGEST
able fit healthy hearty sound strong well
STRONG
happy
ADJECTIVE
green around the gills
Synonyms
WEAK
blah crummy miserable nauseated pale queasy shaky sick to one's stomach throwing up under the weather vomiting
ADJECTIVE
ill
Synonyms
STRONGEST
afflicted ailing diseased infirm poorly woozy
STRONG
down
WEAK
a wreck below par bummed down with feeling awful feeling rotten feeling terrible got the bug indisposed laid low off one's feet on sick list out of sorts peaked queasy rotten run down running a temperature under the weather unhealthy unwell
Antonyms
STRONGEST
healthy
WEAK
good sound strong well
ADJECTIVE
laid-up
Synonyms
WEAK
ailing bedridden broken down confined debilitated declining defective delicate diseased disordered down feeble feverish frail funny green hospitalized ill impaired imperfect in a bad way in poor health incurable indisposed infected infirm invalid lousy mean nauseated not so hot peaked poorly qualmish queasy rickety rocky rotten run down suffering tottering under medication under the weather unhealthy unwell weak wobbly
ADJECTIVE
queasy
Synonyms
STRONGEST
anxious fidgety groggy restless sickly squeamish uncomfortable uneasy
WEAK
bilious concerned green around gills ill ill at ease indisposed nauseated pukish qualmish rocky sick troubled uncertain under the weather unwell upset worried
Antonyms
STRONGEST
comfortable content happy
WEAK
healthy satisfied
ADJECTIVE
sick
Synonyms
STRONG
ailing confined debilitated declining disordered down frail funny green hospitalized ill impaired imperfect incurable indisposed infected invalid mean nauseated peaked suffering tottering wobbly
WEAK
bedridden broken down defective delicate diseased feeble feverish in a bad way in poor health infirm laid-up lousy not so hot poorly qualmish queasy rickety rocky rotten run down under medication under the weather unhealthy unwell weak
Antonyms
STRONG
healthy perfect sound strong well
WEAK
clean content gentle happy moral nice pleased satisfied undiseased
ADJECTIVE
unwell
Synonyms
WEAK
ailing bedridden broken down debilitated diseased feeble feverish frail hospitalized ill impaired in poor health incurable infected infirm invalid laid-up nauseated not feeling well run down sickly suffering under medication under the weather unhealthy weak

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Scott: Keith woke up the day that people are coming in, Sunday morning, and he is sick as a dog.

From The Wall Street Journal • Apr. 6, 2026

“You have your child who is sick as a dog, you have no hope, you find CBD hemp, non-impairing, non-intoxicating,” Goldstein said.

From Los Angeles Times • Jun. 16, 2024

I just returned from a trip where for one hour, I was subjected to the poison en route to the airport and now I’m sick as a dog and had to stay home from work.

From Seattle Times • Sep. 24, 2023

He also would be as sick as a dog the next day.

From Slate • Jul. 1, 2013

Your old Troubadour is sick as a dog again today, but it will not prevent him from going to Magny's this evening.

From The George Sand-Gustave Flaubert Letters by McKenzie, Aimée G. Leffingwel