Green’s Dictionary of Slang

1. a miscarriage.

1897		W.S. Maugham Liza of Lambeth (1966) 95: I’ve ’ad twelve, ter sy nothin’ of two stills an’ one miss.
1942		N. Mitchison Among You Taking Notes 16 Feb. 187: She has had a mis; there seem to be so many these days.
1959		D. Hewett Bobbin Up (1961) 23: Dick had no right puttin’ you on that big rover, the way you are. It’s enough to bring on a mis.
1969		oral testimony in Lighter HDAS II.
1994		Donahue [NBC-TV] The two of you [each] had a miss? [HDAS].

2. (also miz, mizz) a misery, a state of unhappiness.

1918		Chambers’s Journal Mar. 156/2: He won’t get any peace now we’ve seen him. We’ll make his life a mizz.
1936		‘Hectic Harlem’ in N.Y. Amsterdam News 8 Feb, sect. 2: MIZZ. – Blue, melancholy, unhappy, as ‘She’s in the mizz.’ .
1938		Pittsburgh Courier (PA) 24 Dec. 11/1: He’s been away months now and she’s really in a miz.