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A word many won't have heard since they were in nursery school.

However, in backward parts of the UK, there was once an Escort Cosworth which was registered with a numberplate which ended in these three letters... therefore, completely rationally, the car which had this numberplate was referred to as YUM, by fully grown adults.
Awiiiite guvnor, apples n pears, turkish baaf... 'ow did YUM get on at Brunters?

Mate, can't adam'n'eve it, YUM never 'it 200mph today either boss... and when me old china parked up... we saw a small elderly gent chuckle before he was driven away in his big boostin white Saph Cossie? Ye get me?
yum by RS Grant June 28, 2010
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Yellow Dog Updater, Modified

Yum is a great CLI application, with GUI front ends, similar to Apt for RPMs that makes updating, getting information about, installing and removing RPMs easy. It's used by Yellow Dog, Fedora Core, and RHEL (and possibly more distros I do not know about). When you install something via Yum, Yum automatically downloads and installs all dependencies of the package you want if you don't have the dependencies, putting an end to dependency hell if the package you want is in your Yum repositories.

A great Yum configuration file for the most recent stable Fedora Core that adds great repositories can be found at http://www.fedorafaq.org/samples/yum.conf
I escaped dependency hell for Frozen Bubble by using Yum :)
Yum by a thing July 15, 2008

yum yuck 

something you hate but can't help loving, or consuming. Relishing, Compulsion and/or enjoyment of a vile, nasty thing, person, food etc. see also: guilty pleasure, Schadenfreude, Love Sick
Those quickie mart Nachos with pump cheez at 3am were yum yuck.....Also: any Aaron Spelling TV show, Brangelina, Precious Moments figurines, Chihuahuas, snidley remarking/observing Paris Hilton's/Lindsey Lohan's 'careers', picking someone's or your own belly button lint, pikachu, TomKat,redneck breakfast
yum yuck by mochocolateplease August 26, 2006
Well Vic I'm going to go get some "Scrum Yum" or It's time to get some "Scrum Yum"
Scrum Yum by Vince McCliment January 21, 2006

yum ma ma 

an insult for a chinese person's mum
yum ma ma by Sue Ann T September 27, 2008

sick yum saw 

Also, ssik ym ssa. How to say "kiss my ass" in reverse without people getting pissed at you.
Person you don't like: Hey, what's up?

You: Sick yum saw.

Person you don't like: What?

You: Nothing, what's up?
sick yum saw by tazlover11 December 23, 2008

Yum Eata My ass? 

After someone eats you say this to indicate ones love twords the food
“That bacon looks Delicous Alex, yum eata my ass?”
Yum Eata My ass? by Liilacskiies September 25, 2018