Did you perhaps mean mischance?
Etymologies
- From Middle English mommen ("mutter, be silent") and Middle High German mummenschantze ("game of chance as part of a masquerade, mime performance, revel"), from Old French momen ("mask") and cheance ("game of chance") (Wiktionary)
Examples
““Tell her so, for she sits there mumchance, and obliges me to find more inventions than three authors for one piece.””
“Are they obliged to sit mumchance, and to be ordered about till they are the laughing – stock of young and old?”
“She was the managing partner; the life was hers, not his; after his retirement they lived much abroad, where the poor captain, who could never learn any language but his own, sat in the corner mumchance; and even his son, carried away by his bright mother, did not recognise for long the treasures of simple chivalry that lay buried in the heart of his father.”
“Claudius Nero, the titular president of the court, made no attempt to run it; he sat mumchance and let Verres and Rubrius do that.”
“We are also related through the Livii," she pursued as she sat on a couch opposite him, her daughter beside her mumchance.”
“I must say it sounded good sense to me, and Comber sat mumchance.”
“Chess was popular during the 17th century, and many dice games, including even and odd, hazard, passage, mumchance, and novem were played.”
New Discoveries at Jamestown Site of the First Successful English Settlement in America
“Mother played mumchance with my lady, but father, who saith he woulde rather feast a hundred poor men than eat at one rich man's table, came not in till late, on plea of businesse.”
“I couldnt sit mumchance and have everything put on me.”
“I couldn't sit mumchance and have everything put on me.”
Lists
These user-created lists contain the word ‘mumchance’.
-
my fab list
blowsabella, aperçu, froideur, salubrious, abject, gallipot, mumchance, wainscot, virago, macerate, lascivious, clandestine and 181 more...
-
Interesting words
A list of words that are odd or words that I have looked up.
concupiscence, brize, scree, scoria, forestaff, spanaemia, valetudinarianism, distasture, pyrethrum, laudanum, gentian, bicameral and 11250 more...
-
Logolepsy
"Luciferous Logolepsy is a collection of over 9,000 obscure English words. Though the definition of an 'English' word might seem to be straightforward, it is not. There exist so many adopted, deriv...
Anschauung, Areopagus, Argus, Briarean, Dei gratia, Dei judicium, Deo volente, Duecento, Foehn, Geflugelte Worte, Gegenschein, Hakenkreuz and 9230 more...
-
The Aubrey/Maturin List I'm Gonna Mak...
I'm wading through Patrick O'Brian's Aubrey/Maturin novels one by one, and someday, I'll wade through them again and list all the words I learned while reading them.
Edit: I started ma...studdingsail, carronade, mumchance, grumlin-futtocks, crosscat-harpings, holystone, sennit, orlop, orchitis, negus, kevel, altumal and 1112 more...
-
wunderkammer's Words
smarmy, bubkes, elucidate, togs, aeolian, carp, kibosh, bosky, ramshackle, mange, harpy, effervesce and 163 more...
-
British Cant & Slang, Old & New
Mostly, the cant words come from my reprint of Francis Grose's 1785 dictionary of 'The Vulgar Tongue', while the more modern slang has been found at various online sources, e.g. this online diction...
bog-standard, bumbaclot, brown trouser moment, bingo wings, bobfoc, babber, sweating, tantadlin tart, taplash, timber toe, tray trip, twiddle-diddles and 209 more...
-
Wordie/Wordnik Curio Cabinet
Oddments culled from my "main" lists that belong in a display cabinet of their own, plus sundry other curiosities. :-)
zeugma, ziggurat, xiphoid, xeric, whizgigging, whangdoodle, viviparous, vivific, vinolent, verjuice, vellicate, velleity and 1193 more...
-
Red Seas Under Red Skies
Words and phrase from Scott Lynch's book, Red Seas Under Red Skies.
legate, pugnacity, weevil, steady as a dry-d..., chit, sans, apprise, forfend, ken, expatriate, enclave, scrubs and 220 more...
-
thou varlet!
insults that roll trippingly off the tongue
varlet, addlepated, knucklehead, schmuck, ignoramus, bedlamite, nincompoop, nitwit, knave, bungler, blockhead, galoot and 91 more...
-
precious
adorable sounding words and whatnot.
finikin, slimikin, tinkershere, ateknia, kindergraph, skygodlin, amoret, belles-lettres, bellwether, bonnibel, sylph, basorexia and 54 more...
-
Dutchly things
Words having some sort of Dutch origin, probably boring to everyone but me — I'm currently browsing 2,422 entries having "Dutch" in their definitions/etymologies, the best of which should fin...
mynheerify, mynheer, advocaat, dutch bargain, blauwbok, butter-box, quardeel, clinquant, closh, coot, dodkin, dorp and 85 more...
Tweets
Looking for tweets for mumchance.

hernesheir Few words contain the string -mch-.
See *mch. Dec 8, 2011
yarb "There had been school days like this when teachers sent questions thudding on some dream. And you sat mumchance."
- J.P. Donleavy, Franz F Dec 7, 2011
wunderkammer "not from old mumchance, he'd not tell you it was Tuesday" Feb 9, 2007