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4.
Derivative of yummy mummy. A hot-looking mother who dresses overly sexy or downright trashy.
Joe: Ooh, check out that skank! Must be coming back from her nightjob at the blowjob bar.

Bill: Nah man, that scummy mummy is picking up her kids at the preschool. Guess she's passing on the trashon sense.
by Lex Sleuthor April 22, 2009
 
1.
A dirty bitch who has kids for one reason only; to collect welfare money.

Often, they will start early; 15-16 seems to be the norm, however some start much earlier than this. The offspring of such a mother can often be identified by their charming names. Examples of such names include: Denay, Jayden, Chapelle, Mercedes, etc.
Fwark me... she's such a scummy mummy she must be rakin' in the welfare.

Five year old girl: When I grow up (translation: When I'm 14), I wanna be a scummy mummy so I can leave school, get welfare, and sit on my ass doing nothing.

Bogan Male: Fuck those scummy mummies... without them I couldn't get a root, but fucken they take all my dole.
by Jayden Leski November 29, 2006
 
2.
A skanky greasy mother who neglects her children by not making them proper meals and does the least possible so she doesnt get shut down by the NSPCC.
Jessica: What has your mum got you for lunch today Nyah?
Nyah: Left over KFC popcorn chicken from last night after my mum had been out on the lash! She's such a scummy mummy!
by Frank Tourette December 14, 2011
 
3.
A dirty bitch who has kids for one reason only; to collect welfare money.

Often, they will start early; 15-16 seems to be the norm, however some start much earlier than this. The offspring of such a mother can often be identified by their charming names. Examples of such names include: Denay, Jayden, Chapelle, Mercedes, etc.
Fwark me... she's such a scummy mummy she must be rakin' in the welfare.

Five year old girl: When I grow up (translation: When I'm 14), I wanna be a scummy mummy so I can leave school, get welfare, and sit on my ass doing nothing.

Bogan Male: Fuck those scummy mummies... without them I couldn't get a root, but fucken they take all my dole.
by Jayden Leski November 29, 2006