be riled up
To be angry, agitated, or in a frenzied state. Grandpa was riled up as soon as Uncle Ned mentioned the local election.
get riled up
To become angry or agitated or enter into a frenzied state. Grandpa got all riled up as soon as Uncle Ned mentioned the local election.
be/get (all) ˌriled ˈup
(informal, especially American English) be/get very annoyed about something: Instead of getting all riled up about this, we should try to figure out what to do.