noun

• (nautical) A built-in bed on board ship, often erected in tiers one above the other.
• (military) A cot.
• (US) A wooden case or box, which serves for a seat in the daytime and for a bed at night.
• (US, dialect) A piece of wood placed on a lumberman's sled to sustain the end of heavy timbers.

noun

• (slang) Bunkum; senseless talk, nonsense.
  "What she said about me was total bunk. Don't believe a word."
• (obsolete) In early use often in the form the bunk.
  "This knife-throwing act is the bunk"
• (slang) A specimen of a recreational drug with insufficient active ingredient.
  "I still can get off with a pound of bunk and pretend it's some Runtz"

adj

• (slang) Defective, broken, not functioning properly.

verb

• (British, India) To fail to attend school or work without permission; to play truant (usually as in 'to bunk off').
  "The naughty boys decided to bunk school and visit the comic shop."
• (dated) To expel from a school.
  "She was bunked from the convent last term. I don't quite know what for."
• (slang) To depart; scram.
  ""They're moving off," he said. "[…] [T]he funny little man with the beard like a goat is going a different way from everyone else — the gardeners will have to head him off. I don't see Mademoiselle, though. The rest of you had better bunk. […]""