Green’s Dictionary of Slang

satisfactory, correct, lit. ‘as things should be’.

1889		Referee 28 Apr. in Ware (1909) 101/1: Were it not that she is a lady, and possesses the cachet of foreign and not home production, there are folk who might begin to have a dawning suspicion that she is within a couple of miles or so of being not quite as cummifo as she might be.
1909		J. Ware Passing Eng. of the Victorian Era.