sick as a parrot

out sick

Absent from work due to an illness.

sick and tired

Bored to the point of weariness.

sick at heart

Despairing, distressed, or anxious.

sick list

A list of people who are ill.

sick man

A weak member of a peer group, especially the weakest.

sick puppy

A person who is sick (mentally disturbed) in a morbid or gruesome way.

sick to the back teeth

Extremely annoyed, fed up, tired (of or with something).

sick with worry

Extremely anxious or distressed.