(one's) back is up

One is angry, hostile, defensive, or irritable, often due to a particular cause. John's back is up now. You shouldn't have brought up the subject of college. It's election season, so my dad's back is up all the time.

Common Names:

Name	Pronounced	Usage
Hye	hye	Korean
Pruitt	['pru:it]
Ambrose	AM-broz	English
Elke (2)	-	Hebrew
Joona	YO:-nah	Finnish
Sarra	-	Biblical Greek, Biblical Latin, Old Church Slavic