Green’s Dictionary of Slang

provoked, incited to violence or action, gone crazy.

1709		Cibber Rival Fools V i: sir ol.: What say you to a dance, Ladies? gov.: Nay, nay, not I in troth – my jaunting Days are done. sir ol.: Come, come [...] you can foot it still, if you were but well stirr’d].
1946		D. Stivens Courtship of Uncle Henry 154: I’m too smart to say any more but something’s got him stirred up.
1951		D. Stivens Jimmy Brockett 36: I was all stirred up after leaving Sadie’s studio and I decided to walk some of it off.
1982		G.V. Higgins Patriot Game (1985) 64: Got everyone all stirred up again.
1997		C. Hiaasen Lucky You 161: Shiner was so stirred that he patriotically kicked the car.