Knap n. : A protuberance; a swelling; a knob; a button; hence, rising ground; a summit. See Knob, and Knop.

Knap v. t. : To bite; to bite off; to break short.

Knap v. t. : To strike smartly; to rap; to snap.

Knap v. i. : To make a sound of snapping.

Knap n. : A sharp blow or slap.

Example:
how do u flint Knap and what tools do i need?

Taxonomy
Wiktionary, Pronunciation, knappe, Synonyms, Adjective, Adverb, Etymology, past participle, present participle, knapping, Danish, Inflection, knapper, stadion, English, Swedish, flakes, free dictionary.

Defination from the web:
... verb chip is often used as a synonym of the more specific word knap. The term knap is used in archaeology for the production of flaked stone tools and in ... Knap is rarely used in stonemasonry except to denote fine chipping done with smaller hammers but without the chisel. ...