Etymology: Middle English slippen, from Middle Dutch or Middle Low German; akin to Middle High German slipfen to slide, Old High German slīfan to smooth, and perhaps to Greek olibros slippery
Date: 14th century
intransitive verb1 a: to move with a smooth sliding motion b: to move quietly and cautiously :stealc:elapse, pass 2 a (1): to escape from memory or consciousness (2): to become uttered through inadvertence b: to pass quickly or easily away : become lost <let an opportunity slip> 3: to fall into error or fault :lapse 4 a: to slide out of place or away from a support or one's grasp b: to slide on or down a slippery surface <slip on the stairs>c: to flow smoothly 5: to get speedily into or out of clothing <slipped into his coat> 6: to fall off from a standard or accustomed level by degrees :decline 7:sidesliptransitive verb1: to cause to move easily and smoothly :slide 2 a: to get away from :elude, evade<slipped his pursuers>b: to free oneself from <the dog slipped its collar>c: to escape from (one's memory or notice) <their names slip my mind> 3:shed, cast<the snake slipped its skin> 4: to put on (a garment) quickly —usually used with on<slip on a coat> 5 a: to let loose from a restraining leash or grasp b: to cause to slip open :release, undo<slip a lock>c: to let go of d: to disengage from (an anchor) instead of hauling 6 a: to insert, place, or pass quietly or secretly b: to give or pay on the sly 7:slink, abort 8:dislocate<slipped his shoulder> 9: to transfer (a stitch) from one needle to another without working a stitch 10: to avoid (a punch) by moving the body or head quickly to one side