1) Something that's going to be a complete shitshow.

2) something that doesn't make sense when logic is involved, but does when no one thinks about it.
1) "Hi, Bob here and I went to the interwebs asking for ideas on which ways to make a complete ass out of myself on my YouTube channel. This is gonna be a complete slobberknocker, oh boy."

2) The book series "The Hitchhiker's Guide to the Galaxy"
by SLOBBERKNOCKER JOE January 22, 2019
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A huge girthy cock that is 12 inches or bigger and will knock the slobber right out her mouth.
Billy mays here with the all new slobberknocker you just get it hard and when she puts it in her mouth itll knock the slobber out of her its so big!!!!
by Navxr July 13, 2018
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item found in world of warcraft but also the name for a blowjob given with ice cubes in the mouth

or a blow job given in a cold environment
while it was snowing i got a chilly slobberknocker in my car
by barracknroll May 7, 2009
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The act of inserting any bodily fluid into one’s mouth, and then slapping them in the face as hard as possible with said fluid still in their mouth.
“Damn, I took this cute gal back home that night, things were going great until I gave her the Indiana Slobberknocker (Piss edition), now she won’t return my calls”
by stepbroenergy July 2, 2021
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Big crazy event, Something insane happening, or just something crazy in general
"That show was a Slobberknocker!"
by The BRITISH© Dictionary October 30, 2023
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