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Someone who tidies up meticulously to the point of obsessiveness. Named after the hoover in the Teletubbies.
"When we've had a party, your mum turns into a Noo-Noo."
Noo-Noo by I Love Tarquin November 13, 2007

Noo - noo 

Guy 1: ha ha stinky noo - noo

Guy 2: 🤤 noo - noo
Noo - noo by Mistyman6 March 14, 2023
Dude did you see noo-noo's succ game last night?
Noo-Noo by CrispyWaffles00 December 18, 2016
Check out Simon's Noo-Noo, its really small!
Noo-Noo by Jono The Great July 16, 2006
A word used to describe downsyndromes.

They're like Marmite you either hate them or love them...
jesus!! That noo-noo's tongue is bigger than a 12oz sirloin steak! Haha look at that There's a yellow bus full of noo-noo's, stop licking the window your acting like a NOO-NOO!
noo-noo by The King of NooNarnia February 3, 2008
An infant's name for mother's milk. Often used with a pleading tone.
Mama, noo-noo!
Noo-noo by Edani November 9, 2023