Yes, slip is playable
...and is worth 8 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Slip" Definition
noun
A long narrow piece; a strip.
A narrow pew in a church.
A part of a plant cut or broken off for grafting or planting; a scion or cutting.
idiom
Give (someone) the slip Slang To escape the pursuit of.
Let slip To say inadvertently.
Slip one over on Informal To hoodwink; trick.
verb-transitive
To cause to move in a smooth, easy, or sliding motion: slipped the bolt into place.
To get loose or free from; elude.
To give birth to prematurely. Used of animals.
To make a slip from (a plant or plant part).
verb-intransitive
To decline from a former or standard level; fall off.
To escape, as from a grasp, fastening, or restraint: slipped away from his pursuers.
To fall behind a scheduled production rate.
To fall into fault or error. Often used with up.
To move smoothly, easily, and quietly: slipped into bed.
verb
To take cuttings from (a plant) divide into .
To avoid (a punch) by moving the body or head quickly to one side.
To transfer (a stitch) from one needle to another without working a stitch.
To insert, place, or pass quietly or secretly.
To give or pay on the sly.
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