Top Definition
Abbreviation for Jeez, My Mum
A young girl and boy, both in their early teens, were copulating in her bedroom
when her mother was out at the shops. They heard the front door close and
footsteps coming up the stairs. She said " JMM "
by Stias September 10, 2005
jovial mild-mannered mannerisms
I had the pleasure of meeting a young woman recently. She had jmm
by CriostoirHulme August 08, 2005
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