Green’s Dictionary of Slang

used as an obscene excl.

1981		N. Farki Countryman Karl Black 124: Blood claut. Doreen pregnant! What I going to do now?
1983		C. Knight We Shall Not Die 27: ‘Blood claat!’ Petro exclaimed.
2007		Ras Jabari Chronicles of a Hot Stepper 155: ‘Barker!’ Steel shouted. Stepping into the room, Barker’s face lit up. ‘Bloodclaat,’ he said, amazed.
2008		J. Masouri Wailing Blues n.p.: Me answer him yes, so he said, ‘Bloodclaat!’ Me never know, but you are the right man then.