verb

• (transitive)
  "He hath made warres to ceaſſe in all the worlde: he hath broken the bowe, he hath knapped the ſpeare in ſonder, ⁊ brẽt [brent] the charettes in the fyre."
• (transitive)
  "An average workman will knap 3,000 flints in a day of 12 hours, but a good one will make 4,000 at a pinch."
• (transitive)
  "Take one Veſſel of Siluer, and another of VVood, and fill each of them full of VVater, and then knap the Tongs together, as before, about an handfull from the Bottome, and you ſhall finde the Sound much more Reſounding from the Veſſel of Siluer, than from that of VVood: […] ſuch a Communication paſſeth farre better, thorovv VVater, than Aire."
• (transitive)
  "VVith his rod […] he knapt of the uppermoſt heads and tops of the poppies."

noun

• (chiefly archaic or obsolete except UK, dialectal)
• (chiefly archaic or obsolete except UK, dialectal)
  "Foot Stomp […] The sole of the attacker's foot covers the victim's foot without actually touching it. The sounds of the attacker's heel striking the floor creates the knap. The victim adds vocal and physical pain reactions."
• (chiefly archaic or obsolete except UK, dialectal)
• (figurative, gambling, chiefly dice games, obsolete) A method of cheating at a dice game.
  "'Tis your pence a piece, / […] / Preſto begon? or come aloft? VVhat vvay? / Doublets? or Knap? The Cog? lovv Dice? or high?"

verb

• (transitive) To take a small, quick bite at or of (someone or something); to nibble, to nip, to snap.
  "I vvould ſhee vvere as lying goſſippe in that, as euer knapt Ginger, or made her neighbors beleeue ſhe vvept for the death of a third husband: […]"
• (intransitive) To take a small, quick bite.
  "[In Thomas Elyot's book The Boke Named the Governour (1531)] vvere ſome ſharp and quick ſentences; vvhich many of the ſparks could not vvell bear. They complained of his ſtrange terms, as they called them. Theſe Elyot compared to a galled horſe abiding no plaiſters, that vvere alvvays knapping and kicking at ſuch examples and ſentences as they felt ſharp, or did bite them."