(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
Honorinus	-	Late Roman
Rosalina	ro-sah-LEE-nah (Spanish)	Portuguese, Spanish
MaraĴA	mah-RAH-zhah	Esperanto
Dimas	-	Spanish, Portuguese
Ingeborg	ING-e-bawrk (German)	Swedish, Norwegian, Danish, German
Adamu	-	Old Church Slavic