What is the meaning of slipping?

verb

• Move stealthily.
  • usage: "The ship slipped away in the darkness"
  • synonyms: steal, slip
• Insert inconspicuously or quickly or quietly.
  • usage: "He slipped some money into the waiter's hand"
  • synonyms: slip
• Move obliquely or sideways, usually in an uncontrolled manner.
  • usage: "the wheels skidded against the sidewalk"
  • synonyms: skid, slip, slue, slew, slide
• Get worse.
  • usage: "My grades are slipping"
  • synonyms: slip, drop off, drop away, fall away
• Move smoothly and easily.
  • usage: "the bolt slipped into place"; "water slipped from the polished marble"
  • synonyms: slip
• To make a mistake or be incorrect.
  • synonyms: err, mistake, slip
• Pass on stealthily.
  • usage: "He slipped me the key when nobody was looking"
  • synonyms: slip, sneak
• Move easily.
  • usage: "slip into something comfortable"
  • synonyms: slip
• Cause to move with a smooth or sliding motion.
  • usage: "he slipped the bolt into place"
  • synonyms: slip
• Pass out of one's memory.
  • synonyms: slip, slip one's mind
• Move out of position.
  • usage: "dislocate joints"; "the artificial hip joint luxated and had to be put back surgically"
  • synonyms: dislocate, luxate, splay, slip

adjective

• Moving as on a slippery surface.
  • usage: "his slipping and slithering progress over the ice"
  • synonyms: slithering