1. I've caught fish in this lake before but they are all milli's or milli-mouths. 2. Don't be such a milli-mouth and whip his ass. 3. That guy is a milli-mouth maggot!
by Thomas Crews October 20, 2008

When you are in the 69 position and milly pins you down with her knees on your shoulders and shits in your mouth then uses your eyelashes and eyebrows as toilet paper.
by """"""" February 10, 2019

by Bigbattysecrets April 16, 2020

a power-house drug, usually used to 'celebrate' the underground holiday of february the 15th, the date of which the drug was created by a 15 year old girl commonly known as 'Millz', it is usually injected or snorted, but can also be boiled to make tea
by amelia111 February 16, 2009

a 15 year old girl who shags everything in site. She likes one night stands and pretty sure this bitch has STD’s but who knows. Deffo has had many pregnancy scares in life even if it’s unconfirmed. It is also a term used for when another girl acts like her.
by gossip_princess1 May 26, 2020

"Mate, got in a taxi last night and the driver was fit as fuck. Got home and realised I lost my wallet, had to offer her a dirty millie instead"
by obobo September 17, 2020

by the honeybear December 1, 2013
