Green’s Dictionary of Slang

a situation.

1979		Eble Campus Sl. Mar. 6: situ – clipped form of situation: I found he was dating another girl, and I don’t like that situ at all.
1998		I. Welsh Filth 78: The charlie situ should improve tonight.
2012		(con. 1980s) I. Welsh Skagboys 346: Yuv goat tae sortay pill yir wieght in the social situ, ken?
2018		I. Welsh Dead Man’s Trousers 79: Chanel Hemmingwoth stays cool, she’s obviously been in this situ before.