(verb) To plot an extremely convoluted and exacting episodic revenge while incarcerated against the person perceived to be responsible for putting you in prison.
"Nick becomes a media sensation and his career takes off, leaving Blake to SLEETHE in prison, obsessed with hatred and revenge."

(from the DVD synopsis of the movie "Ricochet")
by Odessa23 September 3, 2010
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Getting in and out of bed without disturbing your partner. Especially a grumpy one who doesn't like to get cold.
Wow you were really sleeth last night when you snuck into bed.
by Stumpy66 August 23, 2020
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The politically incorrect plural form of sloth, used instead of 'sloths'. Also a tall deadshit.
Wow...look at all the sleeth.
Fuck you're an idiot, Sleeth.
by Spero August 25, 2007
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