be off-colour

(British & Australian) also be off-color (American & Australian)

to not be feeling as well as usual He had flu a couple of months ago and he's been a bit off-colour ever since.

Name	Pronounced	Usage
Eligio	el-LEE-jo (Italian), el-LEE-khyo (Spanish)	Italian, Spanish
Anca	-	Romanian
Jada (2)	-	Biblical
Fulgenzio	fool-JEN-tsyo	Italian
Vlaho	-	Croatian
Esteban	es-TE-bahn	Spanish