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A Mumpty is a Mum who is far cooler than normal Mums. A Mumpty never tells you to turn your music down, likes your friends, gets pissed with you, provides you with money for extra curricular activities and doesn't set a curfue.
I told Mumpty I wasn't coming back for tea tonight.

Mumpty's coming to the pub with us tonight.
Mumpty by KizzieShadows December 28, 2009
A storage area in a house, usually on the top floor.
The mumpty has become all dusty...we need to clear it up.
mumpty by mumpty lover May 13, 2005
A storage area, usually consists of one whole group.
Eg: The mumpty upstairs needs sorting out.
mumpty by Mumpty lover March 13, 2005
A term used to describe a misshapen oversized Caucasian woman (or sometimes man) who make little or no effort to appear attractive in public. Mumpies can be identified by their choices of sporting short leper hair, crocs with socks, and stained oversized Mickey Mouse T-shirts. They can often be found in cities such as Jacksonville, Florida, as well as in Walmarts across the world.
Bro, my two biggest fears in the whole wide world are horny chimpanzees and if my wife were to become a mumpy!
Mumpy by Mumpy Master July 30, 2022

Mumpties 

slightly bruised banana, grown in the Tuna Town of Adelaide.
E! What the fuck r u fucking mumpties doing
Mumpties by MARTAN LUTHOR PRINCE November 10, 2010