slang. A prison.
1851. Mayhew, Lond. Labour, I. 421. I was in Brummagem, and was seven days in the new stir (prison).
1896. A. Morrison, Child Jago, 313. A man has time to think things out, in stir.
1907. Times, 2 July, 15/3. The prisoner, who said, It is all right. Ill go to stir [prison] over this lot. I did not intend to kill her.