When a penis is inserted anally into a man or woman, and then removed for oral insertion into that same man or woman, without washing off any rectal residue. Play on "sledgehammer", a demolition implement, a Peter Gabriel song title, and the name of a 1980s comedy television show.
First I fucked her ass, then she blew me--sludge hummer!
by Drew Bob September 15, 2006
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Sludge metal is a sort of fusion of late-80s doom metal and hardcore punk, with strong Southern and punk aesthetics tied in.

Although stoner bands like Bongzilla, Electric Wizard, & Unearthly Trance, and the like are often misclassified as sludge, the similarities are primarily a matter of historic concept & some musical attitudes, but they sound distinct -- stoner metal tends to be more melodic, while one of the prime aesthetics of sludge is discordance -- in a Godflesh or Scorn, uncompromising sense.

It grew out of Lousiana in the early nineties, although it is remarkably similar to the Melvins' work prior to that, and there is a significant amount of influence. Though Flipper, Swans, Neurosis can be credited as the first proto-sludge bands, I would opine that EyeHateGod, Crowbar, & Buzzov*en were the earliest distinct bands (88-90). Acid Bath ('91) could also be credited as a sludge band, but I believe they are distinct, although having influenced & been influenced by the genre.
Soilent Green (formed '88) and Dystopia ('91) are the next bands on the family tree, and practiced a grind-influenced form of sludge that's best described as a cacophony of hatred & pop culture references, overladen with discordant bass lines and almost nulled-with-distortion guitar work, staples of sludge metal.
Cavity ('92) formed in Florida, and has broke up since ('03), but are notable for their relatively prolific number of works.
Iron Monkey emerged around '94, taking more influence from stoner music (melody), but I still believe their early work to fall into straight sludge. Rwake ('97) quickly became a very distinct sludge metal band, as much in their distorted, almost nihilistic music, as well as their lyrics & thematic elements.

I won't neglect the questionable Corrupted ('94), who many consider a more straight forward Funeral Doom style, or stoner. However, they have released a great number of records, both in Japan and abroad, especially as split 7" vinyls with other artists, and deserve a certain degree of consideration. As with Dystopia, Soilent Green, and Rwake, they play an extremely discordant music, seemingly only monotonous bass lines overladen with vehement amounts of feedback, whilst most of the vocals are grunting of one form or another, often for notably long periods, broken up by long instrumental sections.

The sound is one of the more vile I've heard in music (perhaps not in a bad way), and is definitely in direct competition with the screeching of black metal, although I haven't the time to get into as long lived a genre as BM. Sludge is, in short, exactly what it says -- slow moving, undeveloped, untreated sewage, flowing with hatred that only rotting in the deepest piles of excretion can produce, & full of misanthropy and self-hatred.
EyeHateGod is one of the earliest sludge metal bands.
by fuggieduggie February 5, 2009
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(noun):
A sex move where ass to mouth is performed, whereas the receiver has fecal incontinence.
"She had a burrito from a dubious food cart a few hours before I stuck it in her ass, so she ended up getting the ol' sludge pop when I ran the ATM."
by Fred Sampson November 12, 2017
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A mucus-like substance that forms on the outer vaginal lips, usually as a result of sustained coital activity. Presents itself in various colors, from white to muddy brown. Occurs as a result of the sexual lubricants coagulating due to friction and the drying effect of exposure to the air.

More commonly referred to as fanny batter.
Darling, would you mind terribly if I wipe away the cunt sludge before performing cunnilingus?

or

Jeez, my cock is covered in your cunt sludge!
by Irritatus Maximus September 18, 2007
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A “Sludge Kid” is a term generally used to describe a fairly indecent human being, typically being male. Factors typically include a guppy face with a stern fat-to-muscle radium of 64%. Sharing many similarities with the infamous boo-boo kid, sludge kids have a lethal toxicity, a result from all of the sunnyd they ingest. Studies suggest that there are approximately 2.5 billion sludge kids today, and rising with a staggering rate.
sludge kid wake up; you’re up to bat!
by JuciGmon July 5, 2019
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To catapult one's anus (i.e. the sludge factory) with a giant wang ... of sorts. When done correctly, all the sludge should be knocked out.
Father Big Boy, please don't sludge knock our wife.
by Robert Pepper FARTS November 25, 2010
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