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
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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 23, 2009
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Aspires to be that kind of young, trendy, active mother on social media, but fails horrifically in all regards. Their regular posts, largely shared from other sources, include how all models are actually ugly without PhotoShop, prize competitions to win holidays to Ibiza, scare stories about people giving out Halloween candy that's secretly drugs and conspiracy theories about Madeleine McCann, as well as horror stories contributed by other Scummy Mummies of things to happen to their children, with captions such as 'If sum1 did that to my wee Beyonce I'd flippin rek them, hnnnnng.'
A typical scummy mummy will spend several hours a day applying make-up, before posting to Facebook that real men like real women and not fake ones like Kate Upton.
by falsetokaiba May 3, 2019
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