Slither 

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)

Slither by zachatk April 15, 2009

slither 

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!"

slither by andre b 90 June 13, 2010

slither 

slither - to do something sneaky or to steal or trick someone

I to slither out of the house because I was grounded.

slither by Sheariah April 18, 2006

slither 

slither- possibly one of th ebest songs ever!!! performed by the best band ever, Velvet Revolver.

Holy crap! slither is on the firggin radio!!!!!

slither by VR girl February 20, 2005

Slither 

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.

Slither by GJ March 5, 2004

slither 

the act of having sex, or fooling around.

"I don't want to hear them get their slither on."

slither by b.c.la December 29, 2006

slither 

A common mispronounciation of the word Sliver

(or if not mispronounced) A very thin piece for people who like eating eel pie or snake sponge cake.

I am not EXpecially hungry today, I Fink will just have a SLITHER

slither by MrJasp January 18, 2008