It is actually called “la meuh“, because the first letter is an m, the third is a vowel and there is no fifth letter. At this point you should consider giving up trying to write french or even consider that I have absolutely no idea what I’m talking about.
Le meuh (startrek.website)
Cells at Overwork - Last Place Comics (lastplacecomics.com)
Source: Cells at Overwork - Last Place Comics...