Green’s Dictionary of Slang

johnny rutter n.

also johnnie rutter

[rhy. sl.]

butter.

1932		‘P.P.’ Rhy. Sl.
1960		J. Franklyn Dict. of Rhy. Sl.
2000		R. Walton Cockney Jack or Fun With Rhyme Sl. 🌐 butter Johnnie Rutter / lay me in the gutter.