(historical) The former currency of Japan until 1870, before the yen.
The shimonsen or shimon, originally worth four mon, but debased to two mon. 1902, Walter Del Mar, Around the World Through Japan, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd., page 136:
(historical) The former currency of the Ryukyu Kingdom until its annexation by Japan.
The badge or emblem of a Japanese family, especially a family of the ancient feudal nobility; typically circular and consists of conventionalized forms from nature.
From a dialectal variant of man; compare West Midland Middle English mon (alongside East Midland Middle English man).
Meanings
(colloquial) Man; used in places such as Jamaica, and Lancashire, Shropshire and the Black Country in England.
I am a Black Country mon. Yow dow know and the Brummies woh understond. 2020, “Black Country Mon”performed by Johnny Cole:
Ee I'm allus glad to see a mon like thee. That's as welcome lad, as welcome as can be. Fotch thi cheer up t'table. Stop as long as th'art able. Fer I'm allus glad to see a mon like thee. 1974, “A Mon Like Thee”, in Best o't' Bunch, performed by The Oldham Tinkers:
Clipping of monster, via Japanese モン (mon) in Pokémon, Digimon, etc.
Meanings
(slang) A creature in a video game, usually one which is captured, trained up and used in battles.
And thus did it come to pass that the boy and the two mons, after a brief final discussion began the training. 2011 June 6, Clayton, “PW! - Training Interlude”, in alt.games.nintendo.pokemon (Usenet):
Here they are, the fans voted for them, and here they are, the Mons that can... 2000 November 25, Thomas Conner, “Digimon Top Ten Choice List”, in alt.fan.digimon (Usenet):
When a mon attacks him, he returns the same strike with the world "Reflection" after it, double the original strength. 2003 February 15, sirSTACK, “Digimon #429”, in alt.fan.digimon (Usenet):
(slang) A video game or anime in which catching and battling creatures is an important element.
At any rate Digimon was the best mon/collector series we've seen yet, to the point its popularity was prolly bigger here than its marketing. 2003 December 9, tito, “Main difference between anime and U.S. cartoons?”, in rec.arts.anime.misc (Usenet):
Pokemon, digimon and all other merchandised mons, what good parent will disagree with me that those little invading, mind rotting things should be tolerated... those should be illegal, too... 2001 May 27, Travis Anton, “Cigarette Smoke”, in alt.home.repair (Usenet):
And dont buy Pokemon or Digimon or any other bloody Mons or you will never hear the ned^([sic]) of it :-) 2001 May 24, Horace Wachope, “Kids Toys”, in alt.ozdebate (Usenet):
(Scotland) come on! Part of a chant for a team or band.
Narrator: Jack's a Celtic fan.
Jack: Mon the hoops! 2014 April 14, Martin Travers, Scarfed For Life: 2nd edition, A&C Black, →ISBN:
'Sing up, runt,' he goes, slapping my back friendly/forceful. 'Mon the Rangers!' 2011 September 1, Alan Bissett, Pack Men, Hachette UK, →ISBN:
I caught sight of a lake of faces chanting 'Mon the Biff! Mon the Biff!" – come on the Biffy Clyro – with a startling and percussive unity. 'Mon. The. Biff!' 'Mon. The. Biff!' 'Mon. The. Biff!' 2022 April 19, Ian Winwood, Bodies: Life and Death in Music, Faber & Faber, →ISBN:
(Scotland) An expression of defiance or as a challenge; often as "mon then"