Nah, it actually sounds more like 'emmerdeur'

https://en.wiktionary.org/wiki/emmerder

A bit of trivia, there's a radio that is called NRJ which sounds like 'énergie' when you say it (in French)

Nobody, to my mind's got this quite right yet so I'll give it a bash...:

MR2 = Ehm Air Duh ~~ Merde :) cuz the middle e is like the ai in air (near enough) and the last e is like the uh in duh (near enough) - Not a native speaker so caveat enunciator

Not really good french from me but is "emm er deux" which sounds similar to "a merde"

It sounds like "Eh merdeux", which in French means "hey filthy" in a bad way, "un merdeux" is someone who's covered in shit.

Emm Err Deux