The act of moving your body upwards during a period of making out in an effort to obtain fellatio (blowjob) from the partner (can also be used for cunnilingus (eating out), but rarely). Such action usually requires a back and forth (left and right) movement to gain the needed height difference and can be enhanced with a hand to head encouragement motion.
"I tried to slither up on Megan last night but got turned down, 5 times."

"Sliver me timbers!" (used to make fun of those who have attempted at slithering and failed)
by zachatk April 15, 2009
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Man, right after I get off work I'm swingin' by the bo.de.ga and pickin' up a fifth a' some Takka an' gettin' slithered.
by andrew May 21, 2004
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While driving or moving forward, "slither" means to keep moving straight. "s" stems from the beggining of both straight and slither.
george-"yo which way now?"
andre-"slither...SLITHER!"
by andre b 90 June 11, 2010
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(v.) caught being a snake
Susan got slithered when she was making out with Brad last night.”
by Mae Kae Sunner June 10, 2019
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slither - to do something sneaky or to steal or trick someone
I to slither out of the house because I was grounded.
by Sheariah March 21, 2006
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A person that whines and complains excessively; a compulsively hateful person; a person with extremely bad taste; a person that will spam message boards with hateful complaints about things he doesn't like and attempt to start flame wars about these topics.
A message board troll is often a Slither.
by GJ March 05, 2004
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