ETU 

ETU (External Thought Unit) is another name for the penis

Jon, youre ETU is showing again

ETU by dipshit bitch July 28, 2008

Etu 

A kind and nice guy but has the temper of a firework, (ignites and dies down soon after). Always typically known for liking getting his own way and always has his own reason for doing something which contradicts what you think. Handsome and can vary from height, not someone you'd like to let go of and if you do you will wih you hadn't. Also enjoys over using tomahawk as a threat.

He was being a typical Etu

Etu by ToxicChaosTrouble June 29, 2011

ETU 

is Emergency Transport Unit used as a fast transport unit mostly you would see them on ambulances! Emergency Transport Unit Was founded in 2019!

We need a ETU/ ALS Ambulance down at Brian GA address 1234 we have a person having an activate OD!

ETU by TheAmboMan August 13, 2021

Etu 

A Cuss word that Means a bish Mess the fuck up Never say it at school one of the worst crosswords banned all over the United States if you do We'll hit you with a shoe Meaning that you will be in big trouble and get expelled probably because the 0% bullying rule

Student : She dropped her homework That was kind of etu

Miss boy : What did you say go to the principal's office

Etu by 459395 February 25, 2022

Etu Kwa Ruu 

An expression from the Nagamese language (in a heavy Konyak Naga tribe accent) which means, "this is it" or "THIS!". It is used generally when a person agrees with something. This expression became a viral meme that spread far beyond Nagamese speaking areas.

Oi! Aji din toh over gorom ase kela. Pani giri bi na laura. It's too hot today, please fuckin rain for fuck's sake
*Rain starts pouring*
ETU KWA RUU!!

Etu Kwa Ruu by NagaJungleMan March 25, 2023

whomst'd've'lu'yaint'nt'ed'ies's'y'es'nt't're'ing'yin’rt’est’n‘etu’ 

The ultimate “who” variant.

Guy: Honey, can you check whomst'd've'lu'yaint'nt'ed'ies's'y'es'nt't're'ing'yin’rt’est’n‘etu’ is at the door?

Girl: Jack I want a divorce.

whomst'd've'lu'yaint'nt'ed'ies's'y'es'nt't're'ing'yin’rt’est’n‘etu’ by Cockwobbler69 April 17, 2021

Etude-checker 

(1) A charlatan posing as a trumpet instructor who offers no educational benefit to the student. (2) One who assigns etudes without offering help of how to play them. (3) One who checks off etudes each lesson regardless of the student's progress.

Charlie didn't help me learn how to play the trumpet, he just listened and checked off the etude and assigned another one for next week, since he isn't a real trumpet teacher, but an etude-checker.

Etude-checker by Hosaphone(tm) Headquarters January 20, 2009