A "spoiler soiler" is that one dickhead that ruins those times when you tell your friend some fake-ass spoilers. They should just stick with the joke and mentally ruin your naive friend, but they just HAD to ruin the joke.
It can be even worse by replacing the fake spoiler with a real spoiler.
Steve: "Yo, Cornelius! Did you know Hodor totes bangs Jon Snow in seasons 6?!"
Cornelius: "Oh my god, really! I didn't watch it! Damn, Steve, you are a huge peeeeenis."
Lisa: "Hey, Cornelius, that didn't actually happen. Steve is just lying."
Steve: "Goddammit Lisa! Don't be such a spoiler soiler!"
*steve dies*
A name given to someone who constantly soils everything - multis, gear, lovelife, sports bog te jebo I bet he’s even soiled his gače. Still a lovely cunt tho.
You’re soiled again, Kraje Soiler.
A person with very poor bowel control who has repeatedly shat themselves either out of laziness or lack of control
MAN: *stood with a brown stain on his pants*
BOY: “look mum it’s the serial soiler”