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the dull headache one gets after spending too much time in a shopping mall.
"Hey you want to grab a coffee?"
"Nah Cherise dragged me out shopping the whole morning, I've got a mallache from another dimension I need to lie down"
or
"Man I have to go buy my girl a birthday present"
"what a mallache!"
mallache by mws79 February 23, 2009
A kid from Dublin who you originally thinks a scumbag but turns out to be a good lad. Soundest man alive after Gerry Adams.
That lad there is an absoloute malachy
Malachy by Woodneister June 20, 2018
mal - uh - key
a typically masculine name given to the best of people on the world. often described as gorgeous, perfect, and very kind and caring. a boy with this name would be the greatest you could ask for, and would stick by your side in exchange for love and support. he is very cute at times and fun to be around, as long as he is kept happy. naming your child Malachy may give the chance of him growing up to be a fantastic son, brother, or husband.
"Have you met Malachy? He's the most perfect man I could ask for!"

"Malachy is so amazing!"
Malachy by finn.likes.ferns January 24, 2019
The name Malachy is used for the sexiest men alive. Any Malachy might be a bit mean to you, but you can easily tell that they're trying to be nice to you. A Malachy has a cute smile, beautiful eyes and a great personality.
Person1: Oh My! Did you see that boy at school!
Person2: Yes!! He's definitely a Malachy!
Malachy by M0EWG0M October 30, 2019
A word used to define a young (usually) male, who looks older than his age and has a very well presented body, found attractive by women, gay men and straight men.
"That bloke was so Malachy!"

"Dude did you see that guy at the beach yesterday?"
"Yeah... The Mal? Juicy as hey!"
Malachy by wrathchild March 7, 2008

Mallachi 

Mallachi is a great cuddler and good at boning too. His penis is bigger than his phone. He’s very smexy too. He loves everyone 3000. And he can be pretty inappropriate. Also I’m on call with him rn as I am typing this. He’s also pretty hot. And he’s MY bestfriend. He also makes everyone who sees him but right away.
Mallachi is so steamy hot it makes me nut when he walks towards me. (I fixed the typos)
Mallachi by Mallachisbsf May 27, 2019