Short for Millennial, as in the Millennial Generation, a retort, usually used disparagingly in response to a Millennial trying to put down an older person as in "Okay, Boomer. You’re trying to sell this as something cool? We're not falling for it."
Okay, Millie. Yours is the generation that is voting overwhelmingly for left wingers. You ARE falling for it.
by hoipolloiboy November 30, 2019

Milly Thompson, the character from Trigun. Partner of Meryl Strife and incredibly tall, hot chick. She's ironically a lightweight and strips when she drinks.
by ColdFusion July 16, 2003

Millies are some of the pengest tings around, when u meet a millie treat her well because if you don't she can get very sensitive and upset and its horrible seeing a Millie upset because she always helping others and making them feel better. They have amazing body's and perfect hair and amazing at makeup. There usually popular but sometimes not but they don't care! As long as there happy it's fine for them.
by chickenwingzzz6709 August 24, 2018

by Click252 May 7, 2019

She is a sweet person that tries to sneak up on people. She is complimented a-lot on her looks by her friends and naturally gains friends that trust her. She is good at playing musical instruments like the drum.
by E.Than101 December 16, 2019
