“Maccy D’s” is a popular nickname for McDonald’s fast food restaurants in the United Kingdom. “Maccy Ds” was posted on the newsgroup uk.singles on June 17, 1996.
 
McDonald’s has also been called “Mickey D’s” and “McDo” (mostly in French-speaking countries). Derogatory nicknames include “Rotten Ronnie’s” (after the Ronald McDonald clown) and “McNasty’s.”
 
     
Wiktionary: Maccy D’s 
Proper noun
Maccy D’s
1. (Britain, slang) McDonald’s.
 
Wikipedia: McDonald’s
McDonald’s Corporation is an American fast food company, founded in 1940 as a restaurant operated by Richard and Maurice McDonald, in San Bernardino, California, United States. They rechristened their business as a hamburger stand, and later turned the company into a franchise, with the Golden Arches logo being introduced in 1953 at a location in Phoenix, Arizona. In 1955, Ray Kroc, a businessman, joined the company as a franchise agent and proceeded to purchase the chain from the McDonald brothers. McDonald’s had its original headquarters in Oak Brook, Illinois, but moved its global headquarters to Chicago in early 2018.
 
McDonald’s is the world’s largest restaurant chain by revenue, serving over 69 million customers daily in over 100 countries[9] across 37,855 outlets as of 2018.
       
Google Groups: uk.singles
Hi de hi…)
Mike Sivier
6/17/96
Brian Dukes

wrote:
>Mind you excile to a Happy Eater is far more appealing than excile to
>a Mc’Donalds. 
 
I think they rate about the same - but Maccy Ds are usually in a built-up area so you can’t really be exiled there.
       
28 March 1999, Sunday Herald (Glasgow, Scotland), “Instant smart-arse,” pg. 4:
Maccy D’s: Short for McDonald’s. Providers of burgers, chips, skyscraper-sized Cokes and other things disapproved of by muesli- eating ‘rents
 
Google Groups: alt.culture.ukc.misc
Good ole maccy D’s
Matt Wheeler
8/18/00
Darn McDonalds…. I just manage to ween myself off Big Macs twice a week, and what do they do ?
 
they go and bring back possibly one of their best “specials” the Classic McRib !!
 
Urban Dictionary
maccy d’s
Slang for McDonald’s, originating in Ulster
Rite lads, we’re goin’ down till Maccy D’s - are youse lot comin’?
by craiglynn666 January 30, 2005
     
Twitter
vito seech
@vivalavito
Maccy D’s - british slang for McDonald’s. :>
7:56 AM · Aug 15, 2009·Twitter Web Client
 
Campaign
Amy Golding November 24, 2009
McDonald’s to trademark slang-brand ‘Maccy D’s’
LONDON - McDonald’s has applied to the Intellectual Property Office to register its popular slang name, ‘Maccy D’s’, as a trademark.
 
The term has been used widely in the UK for many years when referring to the fast-food chain, but has not previously been officially adopted by McDonald’s itself.
     
Twitter
Joe
@Joe54065717
Replying to @JahovasWitniss and @FiveGuys
Uk don’t even get 5guys or Taco Bell so we only eat kfc and maccyds
9:04 AM · Sep 15, 2019·Twitter for iPhone
 
Twitter
Jennie ♡🕊 Love Like This ♡
@_justjennie
To the people that continually sit outside my home supping on your Maccy D’s, im going To start charging there’s that many of you! And all hours of the night too! Funny thing is I’m not even that near to McDonald’s 😂 #Leicester
9:33 AM · Sep 17, 2019·Twitter for iPhone