Johnny Bliss, n. — Green’s Dictionary of Slang

Johnny Bliss n.

also Arthur Bliss, Mick(e)y Bliss

[rhy. sl. = piss n.]

(Aus./UK) an act of urination; also as in the phr. ‘take the piss’.

1969		A. Buzo Rooted III i: I ducked out for a Johnny Bliss.
1992		R. Puxley Cockney Rabbit 124: Micky Bliss Piss.
2000		Guardian G2 17 Feb. 3: All right, treacle, no need to take the Mickey Bliss.
2003		B. Dark Dirty Cockney Rhy. Sl. 18: I’ve been drinking all day and now I’m dying for an Arthur Bliss.