What is the meaning of skulking?

noun

• Evading duty or work by pretending to be incapacitated.
  • usage: "they developed a test to detect malingering"
  • synonyms: malingering

verb

• Lie in wait, lie in ambush, behave in a sneaky and secretive manner.
  • synonyms: lurk, skulk
• Avoid responsibilities and duties, e. G., by pretending to be ill.
  • synonyms: malinger, skulk
• Move stealthily.
  • usage: "The lonely man skulks down the main street all day"
  • synonyms: skulk