under the weather

under the weather: not feeling well, sick Examples of UNDER THE WEATHER Sara coughed and apologized for being under the weather, even though everyone gets sick sometimes. My boss sent me home because I was under the weather and he didn’t want anyone else to catch whatever I had.  

to put off

to put off: to postpone Examples of PUT OF The procrastinating student decided to put off doing his homework until the last minute. The Judge decided to put off reaching a decision until he’d thought about what he heard.

to get over

to get over: to recover from an illness; to accept a loss or sorrow Examples of GET OVER “We just need to get over this wall,” said the prisoner who was leading the escape. The sick man hoped to get over his illness quickly.