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
Kerman	-	Basque
SynnØVe	-	Norwegian
Abisai	-	Biblical Latin
Irmuska	EER-moosh-kaw	Hungarian (Rare)
Lyubochka	-	Russian, Ukrainian
Omobolanle	-	Western African, Yoruba