Female variety of Spide (Northern Ireland) or Chav (Mainland UK). Millies were first established in the 1960s when then worked in the Mills. Financially challenged and burdened with 10 kids by the age of 19, the chain smoking, gum-smacking hoorbags reproduced at astounding rates with their spide counterparts to form the population of council estates. They then spilled out into the wider suburbs of Belfast, infiltrating every park and street corner in Glengormley, Carrickfergus, Bangor and Antrim. The collective noun is Wall, ie A Wall of Millies - demonstrated by their linking of arms in a chain with a minimum of 10 Millies (aka Millbags).
Your Ma's a millie

That slag that wears 1000 gold necklaces, is pregnant and smokes fegs...is a Millie
by Lyndsey October 27, 2004
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Millie is a great friend. She sometimes dates bad guys, but she gets over it. She loves herself and doesn't care what people think.

Gif is a joke lmao
Millie is so nice!
by pseudonymousss June 20, 2018
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Millie is a beautiful and kind soul with pure intentions and a soft heart. You could look forever, but you'll never find a more good-natured, caring, thoughtful, helpful, considerate, gentle, sympathetic, understanding, friendly, pleasant and well meaning person on this planet than Millie. She is loved dearly among family and friends for her selflessness and compassionate personality. Her generosity and hospitality see no bounds; kinder people don't exist. Not to mention that she is also incredibly intelligent and funny. No matter what you may be going through, she can find a positive in it. She may not have the answer to all of your problems, which is okay, but she makes up for it through her unbelievable ability to find a positive in everything. She is an excellent listener and brilliant at consoling people. Regardless of the situation, she will find a way to make it better. She is the master of turning people's frowns upside down and putting a smile back on your face through her wit and kind words - it's a truly magical power that she possesses. A single smile from her is all it takes to get you grinning again. When you talk to her, it's like everything negative in your life disappears. She radiates positive energy and shares it with everyone around her. She is the embodiment of perfection, in both appearance and personality, but she would never admit to it because she is too humble.

Millie is undeniably special and unique in so many ways. She truly is one in a Millie-on.
Millie is my best friend. She is all one could ever ask for in a companion.
by bestooooo April 25, 2022
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A millie is an all rounder amazing friend and when in a relationship loyal but worries alot cause they love that person. Millie's are sporty a born artist and extremely strong. Millie's can be intimidating and have anxiety that you are afraid of her. Millie's can be VERY romantic and loving . As millie's are very sporty they are rather fit but still eat ALOT of food.
Millie is a loyal person
by Random 4204 April 1, 2020
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Millie is a dumb bitch who should die In a hole millies will bully you and grab you by the collar and hoodie and yell at you in the kitchen when you are trying to make fucking cookies in 6th grade cooking class.
Omg is that a Millie let’s run.
by Howtokillyourself101 October 20, 2019
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Girls that hang around in big group, mainly in very loyalist or republican areas of Belfast and in run-down housing estates. Classic Millie icons include tracksuits, (either in brightly coloured vile velour or a rip-off of adidas or other brand name) huge hoop earrings, 4 piercings in each ear, hair tied back very tightly into either a bun with too many 'scrunchies' to count or in a really high ponytail with 6 bobbles, making it stick up at an angle....Millies add 'like' to the end of every other statement....
Millie:'u slabberin 'bout my mate?'
'if yer slabberin 'bout my mate i'll get me boyfriend's cousin's mate ta knack yer black aff like'
(won't let other girl get a word in edgeways)

Millie:'ya have a feg? im dyin fer a feg like!'
by prosetic leg basher October 29, 2005
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Millie is usually a nickname for Amelia. Millie's usually hate their real name. Millie's are nice and fun. Millie's love the color green and play the violin. Millie usually have a small group of really weird friends. Millie usually goes for the popular boy and they usually like her back.
Teacher: That Millie girl is one of a kind.
by Ocean_76579675 December 13, 2017
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