Green’s Dictionary of Slang

(UK black) a mild excl. suggesting surprise, usu. as what the blouse and skirt! who the...! etc.

1999		(con. 1979–80) A. Wheatle Brixton Rock (2004) 104: Who the blouse an’ skirt is going to knock on my door at eleven o’clock on a Sunday morning?
2001		(con. 1981) A. Wheatle East of Acre Lane 33: ‘Ah wha de blouse an’ skirt!!’ screamed Smiley/ ‘You waan kill me?’ [Ibid.] 193: Blouse an’ skirt! Get in de car, man.
2013		Jamaica Patwah 25 Apr. 🌐 Blouse an skirt! ah weh dat come fram?