A Mwen is a strange creature that habituates the North and most boroughs of London, it may only be stirred by the promise of a good party and the sounds of heavy bass.
Only disturb in cases of REAL partying.
"O M G ...I found a Mwen on the sofa!"
"Hey, get the Mwen out, it's time for a PARTY"
"Don't disturb the slumberin Mwen"